1. Air in a balloon does 39 J of work while absorbing 94 J of heat. What is its change in internal energy?

2.  An aluminum vat is 18 m long at room temperature (20°C). How much longer is it when it contains boiling water at 1 atm pressure?

3. An apartment has the dimensions 13 m by 7 m by 4 m. The temperature is 35°C, and the relative humidity is 56 percent. What is the total mass (in kg) of water vapor in the air in the apartment?

 

 

Answer rating: 100% (QA)

1 To find the change in internal energy of the air in the balloon we can use the First Law of Thermodynamics which states that the change in internal ... View the full answer