The change in temperature of moist air

[ssonia]

Homework Statement

1 kg of moist air and 1 g condenses.

What will the change in the temperature of the moist air be?

Heat of Vaporization = 2.5*10^6 J/kg

2. The attempt at a solution

The moist air will warm due to condensation.

Heat of Vaporization=2.5*10^3 J/g

Specific heat at constant pressure = 1004 J/K.kg = 1.004 J/K.g

My next step was to divide the heat of vaporization with the specific heat to get the temperature in Kelvin, however the value seems to large.

Any help would be grateful...Thanks.

 

[Bystander]

How much too large?

 

[rude man]

Homework Statement

1 kg of moist air and 1 g condenses.

What will the change in the temperature of the moist air be?

Assuming equlibrium, if some of it condenses and some of it does not, where on the p-v diagram must you be? Hint: think "quality".

 

[Chestermiller]

Did you remember to include the mass of the air (1kg) in the calculation?