New Worksheet - Chemistry - Temperature and Heat

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) (ΔT)
- q object = q water + q calorimeter

Problem 1
100 g of ethanol at 25.0 degrees is heated until it reaches 50.0 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 789 g of liquid ammonia from 25.0 degrees C to 82.7 degrees C? The specific heat of liquid ammonia is 4.70 J / (g)(C).
Answer: _______________________

Problem 3
A solid substance has a mass of 250 g. It is cooled by 25.0 degrees C and looses 4930 J of heat. What is the specific heat?
Answer: _______________________

Problem 4
A piece of metal with a mass of 14.9 g is heated to 98.0 degrees C. When the metal is placed in 75.0 g of water at 20.0 degrees C, the temperature of the water rises by 28.5 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 45.5 g and a temperature of 80.5 degrees C is dropped into 192 g of water at 15.0 degrees C. What is the final temperature of the two combined?
Answer: _______________________


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