On a cold winter night the temperature is -5ºC (23ºF) and the relative humidity is 100%. Under these conditions, ice/snow on the ground and water vapor in the air are in equilibrium...no more ice will form (frost) nor will any ice/snow sublimate. Now suppose the air pressure increases, which disturbs this equilibrium. Consider the following possible processes which may occur in response to the change of pressure:
CASE-A: More ice forms as frost (1) and the water vapor in the air gets warmer (4). Can this happen, or does it violate the laws of thermodynamics?
it can happen
both laws violated
2nd law violated
1st Law violated
CASE-B: More ice forms as frost (1) and the water vapor in the air gets colder (3). Can this happen, or does it violate the laws of thermodynamics?
2nd law violated
it can happen
both laws violated
1st Law violated
CASE-C: Ice/snow sublimates (2) and the water vapor in the air gets colder (3). Can this happen, or does it violate the laws of thermodynamics?
it can happen
1st Law violated
both laws violated
2nd law violated
CASE-D: Ice/snow sublimates (2) and the water vapor in the air gets warmer (4). Can this happen, or does it violate the laws of thermodynamics?
it can happen
1st law violated
2nd Law violated
both laws violated
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