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Molar heat capacity of gases are temperature dependent

Internal energy of

H_{2} O

remains constant during conversion of liquid into its vapour at constant temperature

During fusion of ice into water, enthalpy change and internal energy change are almost same at constant temperature

On increasing the temperature of an object, the average kinetic energy of its particles remains the same.

answer is B, C.

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Detailed Solution

Molar heat capacity are temperature dependent. During fusion of ice into water, internal energy and enthalpy are almost same

During fusion of ice into water enthalpy change and internal energy change are almost same at constant temperature.

The average kinetic energy basically tells the temperature of the body. When temperature of body increases, the average kinetic energy increases and when average Kinetic energy decreases, there is decrease of body temperature.

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