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Standard X

Physics

Calorimeter

Assertion :La...

Question

Assertion :Latent heat of fusion of ice is $336000 J {k g}^{- 1}$ . Reason: Latent heat refers to heat required to change of state without any change in temperature.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Both assertion and reason are correct
Latent heat of fusion of ice is $336000 J / K g$ .
Latent heat is the heat required or released when substance under goes the phase change from solid to liquid or liquid to solid respectively.
$1 K g$ Ice needs $336000 J$ heat to melt into $1 K g$ of water and $1 K g$ water releases $336000 J$ of heat to freeze into $1 K g$ of ice.

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Assertion :Latent heat of fusion of ice is 336000Jkg−1. Reason: Latent heat refers to heat required to change of state without any change in temperature.

Assertion :Latent heat of fusion of ice is $336000 J {k g}^{- 1}$ . Reason: Latent heat refers to heat required to change of state without any change in temperature.