How much heat must be removed from 5.00 grams of steam at positive 125°C to ice at negative 25°C? Express your answers in Joules. Note that the specific heat of ice, liquid water and steam are 2108 J/kgK, 4187 J/kgK and 1996 J/kgK, respectively. While the latent heat of fusion and latent heat of vaporization of water are 334x103 J/kg and 2256x103 J/kg, respectively.

A closed steam room of volume 125 m has a temperature 45 C and has a RH=100%. Calculate: a. The mass of water vapor in the room; b. The person inside decides that it is too hot and lowers the thermostat's temperature to a new temperature of 35 C. What is the mass of water vapor for this temperature? c. How much water vapor will condense, in order to still have RH=100% in the room?

Handwritten Only.

For substance A, it is known that the vapor pressure at 300K is 100kPa. It is also known that the boiling point temperature is 340K at 150 kPa. Other given information about substance A: Cpl= 200 J/mol.K and Cpv = 180 J/mol.K c) Using the correlation developed in part a), determine the latent heat of vaporization of substance A in kJ/kmol d) 2 mol of substance A goes through a process where its temperature changes from 400K to 300K at constant pressure 150kPa. i) What phase is present initially? ii) What phase is present at the final state? iii) Determine the total amount of energy transferred (in kJ) through the process and state whether the energy is transferred to or from the substance.