Statement (I): A device in which heat measure | vedclass

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(D) Statement $(I)$ is true: $A$ calorimeter is indeed a device used for measuring the heat involved in physical or chemical processes.Statement $(II)

Vedclass · Accepted Answer

Both statements $I$ and $III$ are true,but statement $II$ is false

Vedclass · Answer

(D) Statement $(I)$ is true: $A$ calorimeter is indeed a device used for measuring the heat involved in physical or chemical processes.Statement $(II)$ is false: While skating,the pressure applied by the skates on the ice lowers the melting point of the ice (Regelation),causing it to melt into a thin layer of water that acts as a lubricant. The statement incorrectly attributes this to an increase in temperature.Statement $(III)$ is true: In an isolated system like a calorimeter,the heat lost by the hot body equals the heat gained by the cold body,meaning the total internal energy of the system is conserved.Therefore,statements $(I)$ and $(III)$ are true,while statement $(II)$ is false.

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