Assume the eccentric professor has a daily special request for her coffee. She likes to have the 250.0 mL of coffee frozen at -10.0°C overnight and then wants it heated to 95°C when she gets there in the morning.
ΔHfusion = 6.02 kJ/mol; ΔHvaporization = 40.67 kJ/mol; Csolid = 33.1 J/(molx°C);
Cliquid = 75.4 J/(molx°C);
Cgas = 33.1 J/(mol x °C)
Boiling point = 100°C; and
Melting point = 0°C.
Assume coffee and milk have all the physical properties of water, i.e., C = 4.184 J/g°C, d = g/mL.
a. How much heat energy is required to heat the coffee as per the special request? (Show your work.)
b. Identify the name and process of each phase change in the coffee.