Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.

Lesson: Calorimetry and Specific Heat Capacity

Worksheet • 16 Questions

Q1:

A woman with a mass of 66.0 kg does some vigorous exercise, after which she has a body temperature of 3 9 . 0 C . Determine the rate at which she must cool her body to reduce its temperature to 3 7 . 0 C in 3 . 0 0 × 1 0 3 s if it continues to be internally heated at a rate of 110 W. Use a value of 4 1 8 0 / J k g C for the specific heat capacity of the woman’s body.

Q2:

The same heat transfer into identical masses of different substances produces different temperature changes.

Calculate the final temperature when 1.00 kcal of heat transfers into 1.00 kg of water, originally at 2 0 . 0 C . The specific heat capacity of water is 1 . 0 0 0 / k c a l k g C .

Calculate the final temperature when 1.00 kcal of heat transfers into 1.00 kg of concrete, originally at 2 0 . 0 C . The specific heat capacity of concrete is 0 . 2 0 0 / k c a l k g C .

Calculate the final temperature when 1.00 kcal of heat transfers into 1.00 kg of steel, originally at 2 0 . 0 C . The specific heat capacity of steel is 0 . 1 0 8 / k c a l k g C .

Calculate the final temperature when 1.00 kcal of heat transfers into 1.00 kg of mercury, originally at 2 0 . 0 C . The specific heat capacity of mercury is 0 . 0 3 3 0 / k c a l k g C .

Q3:

You leave a pastry in the refrigerator on a plate and ask your roommate to take it out before you get home so you can eat it at room temperature, the way you like it. Instead, your roommate plays video games for hours. When you return, you notice that the pastry is still cold, but the game console has become hot. Annoyed, and knowing that the pastry will not be good if it is microwaved, you warm up the pastry by unplugging the console and putting it in a clean trash bag (which acts as a perfect calorimeter) with the pastry on the plate. After a while, you find that the equilibrium temperature is a nice, warm 3 8 . 3 C . You know that the game console has a mass of 2.1 kg. Approximate it as having a uniform initial temperature of 4 5 C . The pastry has a mass of 0.16 kg and a specific heat of 3 . 0 / k J k g C and is at a uniform initial temperature of 4 . 0 C . The plate is at the same temperature and has a mass of 0.24 kg and a specific heat of 0 . 9 0 / J k g C . What is the specific heat of the console?

Preview