11.4 If 42.0 k of heat is added to a 32.0-g sample of liquid meth- ane under 1 atm of pressure at a temperature of -170°C, what are the final state and temperature of the methane once the system equilibrates? Assume no heat is lost to the surroundings. The normal boiling point of methane is -161.5 °C. The specific heats of liquid and gaseous meth- ane are 3.48 and 2.22 J/g-K, respectively. [Section 11.4] P = 1.00 atm 008 42.0 kJ tetR 3 () 2 32.0 g CH4 AHvap 8.20 kJ/mol T = -170 °C 11

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