Total Enthalpy Change for a Cooling Process
A 2.50 mol sample of gaseous water at 110°C and 1 atm is cooled until it completely solidifies at -10°C. Given that ΔHvap = 40.7 kJ/mol and ΔHfus = 6.02 kJ/mol for water, which of the following expressions represents the total heat change for this process?
A
2.50(40.7 + cp,gΔT1 + cp,lΔT2 + 6.02 + cp,sΔT3) kJ
B
-2.50(40.7 + cp,gΔT1 + cp,lΔT2 + 6.02 + cp,sΔT3) kJ
C
-2.50(40.7 - 6.02) kJ
D
-2.50(40.7 + 6.02) kJ
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