# NCERT Class 11 Physics Solutions: Chapter 11 – Thermal Properties of Matter-Part 6

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Question 11.14:

In an experiment on the specific heat of a metal, a block of the metal at is dropped in a copper calorimeter (of water equivalent ) containing of water at . The final temperature is Compute the specific heat of the metal. If heat losses to the surroundings are not negligible, is your answer greater or smaller than the actual value for specific heat of the metal?

Mass of the metal,

Initial temperature of the metal,

Final temperature of the metal,

Calorimeter has water equivalent of mass,

Volume of water,

Mass of water at temperature

Fall in the temperature of the metal:

Specific heat of water,

Specific heat of the metal

Heat lost by the metal,

Rise in the temperature of the water and calorimeter system:

Heat gained by the water and calorimeter system:

Heat lost by the metal Heat gained by the water and colorimeter system

If some heat is lost to the surroundings, then the value of C will be smaller than the actual value.

Question 11.15:

Given below are observations on molar specific heats at room temperature of some common gases.

The measured molar specific heats of these gases are markedly different from those for monatomic gases. Typically, molar specific heat of a monatomic gas is . Explain this difference. What can you infer from the somewhat larger (than the rest) value for chlorine?