New Worksheet - Chemistry - Temperature and Heat (II)

Formulas:
C = 5/9 (F - 32)
F = 9/5 (C) + 32
K = C + 273.15
1 calorie = 4.184 Joule
1 food calorie (Cal) = 1,000 chemistry calories (cal)
q = (m) (c) (change in T)
- q object = q water + q calorimeter

Problem 1
119 g of ethanol at 51.0 degrees is heated until it reaches 92.0 degrees. The specific heat of ethanol is 2.46 J / (g)(C). How much heat does the ethanol gain?
Answer: _______________________

Problem 2
How much heat is required to raise the temperature of 249 g of liquid ammonia from 61.5 degrees C to 81.2 degrees C? The specific heat of liquid ammonia is 4.70 J / (g)(C).
Answer: _______________________

Problem 3
A solid substance has a mass of 180 g. It is cooled by 76.1 degrees C and looses 8040 J of heat. What is the specific heat?
Answer: _______________________

Problem 4
A piece of metal with a mass of 11.4 g is heated to 58.7 degrees C. When the metal is placed in 88.0 g of water at 37.0 degrees C, the temperature of the water rises by 57.0 degrees C. What is the specific heat of the metal?
Answer: _______________________

Problem 5
A piece of gold (specific heat = 0.129 J / (g)(C)) with a mass of 91.2 g and a temperature of 35.8 degrees C is dropped into 937 g of water at 19.8 degrees C. What is the final temperature of the two combined?
Answer: _______________________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Chemistry - Atomic Mass (II)

Formulas
1 amu = 1.66 x 10–24 g
g / amu = # of moles
1 mole = 6.02 x 1023

Problem 1
Write out the balanced reaction for the complete combustion of C14H30.
Answer: ____________________________________________________________________________________

Problem 2
If an automobile completely combusts 9.22 grams of C14H30 (see your reaction for #1), how many grams of carbon dioxide will be produced?
Answer: ___________________________

Problem 3
What is the mass of one CoCl2(NH3)4 molecule in amu?
Answer: ___________________________

Problem 4
Write out the balanced reaction for the formation of Fe(H2O)6.
Answer: ____________________________________________________________________________________

Problem 5
If in the reaction from #4 4.31 moles of Fe (iron) are used, how many moles of Fe(H2O)6will be produced?
Answer: ___________________________

Problm 6
What is the mass of one Ir atom in grams?
Answer: ___________________________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Chemistry - Entropy (II)

Problem 1
Write out the balanced equation that shows that beryllium reacts with water to form beryllium hydroxide and hydrogen.
Answer: ________________________________________________________


Problem 2
If you have 25.0 grams of carbon in one pile and 55.0 grams of carbon in the other, which sample of carbon has more entropy?
Answer: ________________


Problem 3
If a reaction has a ΔH of – 135.0 kJ / mole and is spontaneous for all temperatures less than 177 K, what is its ΔS?
Answer: ________________


Problem 4
If a reaction has a ΔH of – 118.0 kJ / mole and is spontaneous for all temperatures less than 183 K, what is its ΔS?
Answer: ________________


Problem 5
If the ΔH of a certain reaction is – 1031 kJ/mole and the ΔS is – 195 Joules / (mole) (K), what is the temperature range for which this reaction is spontaneous?
Answer: ________________



© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Chemistry - Combined Gas Law (II)

0 degrees C = 273.15 K
P1 V1 / T 1 = P2 V2 / T2
1.000 atm = 101.3 kPa
760.0 torr = 1.000 atm
760.0 mmHg = 1.000 atm

Problem 1
A balloon is filled with air so that its volume is 3.1 L at 59.0 degrees C. It is then lowered into a vat of liquid nitrogen so that it reaches a temperature of – 168.0 degrees C. Assuming that the pressure stays constant, what is the new volume?
Answer: ________________

Problem 2
A balloon is filled with air so that its volume is 2.9 L at 73.0 degrees C. It is then lowered into a vat of liquid nitrogen so that it reaches a temperature of – 159.0 degrees C. Assuming that the pressure stays constant, what is the new volume?
Answer: ________________

Problem 3
A balloon is filled with helium at a temperature of 97.0 degrees C and a pressure of 415 mmHg so that its volume is 6.15 L. It then rises to an altitude where the temperature is 11.0 degrees C and the pressure is 810 mmHg. What is its volume at that altitude?
Answer: ________________

Problem 4
A chemist collects 64.1 mL of nitrogen gas at 17 degrees C and 450 torr. What would the volume be if the temperature is changed to 554 K and the pressure is raised to 8.24 atm?
Answer: ________________

Problem 5
A chemist collects 48.6 mL of oxygen gas at 38 degrees C and 430 torr. What would the volume be if the temperature is changed to 818 K and the pressure is raised to 6.73 atm?
Answer: ________________

Problem 6
A balloon is filled with air so that its volume is 7.5 L at 43.0 degrees C. It is then lowered into a vat of liquid nitrogen so that it reaches a temperature of – 225.0 degrees C. Assuming that the pressure stays constant, what is the new volume?
Answer: ________________

Problem 7
A chemist collects 46.1 mL of nitrogen gas at 62 degrees C and 320 torr. What would the volume be if the temperature is changed to 631 K and the pressure is raised to 8.87 atm?
Answer: ________________

Problem 8
A balloon is filled with helium at a temperature of 57.6 degrees C and a pressure of 584 mmHg so that its volume is 4.33 L. It then rises to an altitude where the temperature is 57.5 degrees C and the pressure is 836 mmHg. What is its volume at that altitude?
Answer: ________________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Science - Acceleration (II)

Acceleration Problems

formula: acceleration = (final velocity - initial velocity) / time

Find the acceleration in m/s2
1. If the object originally travels at 4 m/s and accelerates to 12 m/s in 6 sec.
Answer: _______________

2. If the object originally travels at 6 m/s and accelerates to 8 m/s in 4 sec.
Answer: _______________

3. If the object originally travels at 10 m/s and slows down to 2 m/s in 2 sec.
Answer: _______________

4. If the object originally travels at 15 m/s and accelerates to 23 m/s in 6 sec.
Answer: _______________

5. If the object originally travels at 13 m/s and slows down to 6 m/s in 3 sec.
Answer: _______________

Find the final velocity in m/s
6. If the object originally travels at 2 m/s and accelerates at 6 m/s2 in 5 sec.
Answer: _______________

7. If the object originally travels at 3 m/s and accelerates at 7 m/s2 in 9 sec.
Answer: _______________

8. If the object originally travels at 5 m/s and accelerates at 11 m/s2 in 4 sec.
Answer: _______________

9. If the object originally travels at 10 m/s and accelerates at -4 m/s2 in 2 sec.
Answer: _______________

10. If the object originally travels at 2 m/s and accelerates at 7 m/s2 in 34 sec.
Answer: _______________

Find the time in seconds
11. If the object originally travels at 4 m/s and accelerates at 6 m/s2 to reach a velocity of 33 m/s.
Answer: _______________

12. If the object originally travels at 6 m/s and accelerates at 3 m/s2 to reach a velocity of 41 m/s.
Answer: _______________

13. If the object originally travels at 1 m/s and accelerates at 10 m/s2 to reach a velocity of 33 m/s.
Answer: _______________

14. If the object originally travels at 6 m/s and accelerates at -6 m/s2 to reach a velocity of 63 m/s.
Answer: _______________

15. If the object originally travels at 2 m/s and accelerates at 3 m/s2 to reach a velocity of 66 m/s.
Answer: _______________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Science - Speed (II)

Speed Problems

formula: speed = distance / time

Find the speed in m/s
1. If 500 meters are traveled in 30 seconds. Answer: _______________
2. If 4 km are traveled in 12 minutes. Answer: _______________
3. If 300 meters are traveled in 50 seconds. Answer: _______________
4. If 450 meters are traveled in 6 minutes. Answer: _______________
5. If 600 meters are traveled in 45 seconds. Answer: _______________

Find the distance in meters
6. If the object travels at 300 m/sec for 15 sec. Answer: _______________
7. If the object travels at 800 m/sec for 90 sec. Answer: _______________
8. If the object travels at 1.5 km/sec for 5 minutes. Answer: _______________
9. If the object travels at 3 km/hr for 6 hours. Answer: _______________
10. If the object travels at 300 m/sec for 7 minutes. Answer: _______________

Find the time in seconds
11. If the object travels at 80 m/sec for 300 meters. Answer: _______________
12. If the object travels at 100 m/sec for 700 meters. Answer: _______________
13. If the object travels at 1.5 km/sec for 250 meters. Answer: _______________
14. If the object travels at 3 km/hr for 6 km. Answer: _______________
15. If the object travels at 300 m/sec for 700 meters. Answer: _______________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

5 Ways to Make Your Home a Learning-Friendly Zone

Kids need a place to soak up all the knowledge of the universe without distractions. Here’s how to make your home a homework haven for even the youngest learner.

Keep It Neat and Organized
Just like it’s difficult for you to work in a cluttered environment, your children’s productivity will also suffer with disorganization. Their workspace should be clean and tidy. You can achieve this by adding a cable holder to corral any wayward cords, keeping a trashcan within reach, and adding a few fun decorations that your kids will want to see and hence will be more inclined to keep their view free and clear of clutter.

Create a Reading Nook
Encouraging your child to read is the single most important thing you can do to bolster their academic skills. Not only does opening a book expose children to new things, but it will also help them refine their understanding of the world. Reading further boosts creativity and imagination, which are important components for problem-solving. Give your child a dedicated “reading nook” where he or she can retreat with a good book. According to HomeAdvisor, this space should feature natural light as well as ample room to relax and get comfortable. Privacy is also important, so make sure your child’s reading corner is sectioned off from the rest of the home. If space is a premium, you can always use curtains or room partitions. A small bookcase will ensure everyone has ample room to store their favorite literary masterpieces. Check out The Children’s Book Review for ideas on reading materials for kids of all ages.

Ensure Your Child Has Access to Everything They Need
When it’s time to settle in for classwork or homework, make sure your child has the tools they need to succeed. It is not simply enough to have a few notebooks, a box of crayons, and a handful of pencils, although these items are certainly important. Scholastic recommends keeping an arsenal of supplies for regular school work, a calculator for math assignments, and plenty of supplies on hand for arts, crafts, and science projects. If your child does work online, provide them with high-speed internet access and a color printer.

Choose Your Space Wisely
When it comes to where your child will do the work, location is key. Pam Myers of the Child Development Institute explains that some kids thrive in the middle of the action, such as the kitchen table. Others will need a place where they aren’t bothered. If your child is easily distracted, it may be best to keep them pointed away from the window so they can’t see their friends playing outside when they are supposed to be finishing their homework. Make sure their space is large enough to spread out and encourage them to work independently.

Ask for Your Child’s Input
Once you’ve decided on a location and have taken care of organization, don’t neglect to ask your child for their opinion. After all, this is their workspace. Giving your children the power to make some decisions will teach responsibility and encourage self-discovery. Giving them choices will build confidence and ensure they know their voice is heard. You never know what insight your child will bring that will make his or her workspace better for their needs, and that’s the entire point of providing a dedicated area for learning.

With a few minor tweaks to your space, you can make a distraction-free zone where your kids will be able to focus on the task at-hand. Academic success doesn’t take a huge investment, just some time, planning, and an out-of-the-way corner.

guest post by Susan Good from retirededucator.org

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