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Measuring Temperature

True or false...

Question

True or false?

(a) When heat is taken away from a substance it expands.

(b) The heat absorbed by a substance is not dependent upon its mass.

(c) The unit of specific heat is a °C.

(d) A bimetallic strip is used in an electric heater to keep the water temperature constant.

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Solution

(a) False

Description: When heat is taken away from a substance it contracts because temperature of the substance decreases.

(b) False

Description: Heat capacity of a substance does not depend on the mass of the substance but the amount of heat absorbed by the substance depends upon the mass.

(c) False

The amount of heat required to raise the temperature of 1 kg of a substance by 1⁰C is called the specific heat of the substance. Its SI unit is Cal/(kg ⁰C).

(d) True

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