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Question
Assertion :Phase transition involves change in internal energy only. Reason: Phase transition occurs at constant pressure.
Read the above assertion and reason and choose the correct option regading it.
Assertion :Phase transition involves change in internal energy only. Reason: Phase transition occurs at constant pressure.
Read the above assertion and reason and choose the correct option regading it.
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Solution
The correct option is D Assertion is incorrect but Reason is correct
In phase transitions, one phase of a substance is converted in bulk into another, at constant temperature and pressure. Fusion (melting) of a solid, vaporization of a liquid and sublimation of a solid are the examples of phase transition.
During the phase transition, apart from the change in the internal energy, there is enthalpy change which is known as enthalpy of phase transition.
The phase transition occurs at the constant temperature and constant pressure.
Thus, the assertion is incorrect but the reason is correct.
In phase transitions, one phase of a substance is converted in bulk into another, at constant temperature and pressure. Fusion (melting) of a solid, vaporization of a liquid and sublimation of a solid are the examples of phase transition.
During the phase transition, apart from the change in the internal energy, there is enthalpy change which is known as enthalpy of phase transition.
The phase transition occurs at the constant temperature and constant pressure.
Thus, the assertion is incorrect but the reason is correct.
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