The heat required to raise the temperature of a body is given by
Correct answer: A. mass times specific heat capacity times temperature change
- A. mass times specific heat capacity times temperature change
- B. mass divided by specific heat capacity
- C. specific heat capacity times temperature change only
- D. mass times temperature change only
Explanation
The formula Q equals mc times delta T holds whenever there is no change of state, and specific heat capacity is the heat needed to raise one kilogram by one kelvin. Water has an unusually high value of about 4200 J per kg per K, which is why it is used as a coolant. During melting or boiling this formula does not apply, because the temperature does not change.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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