How much heat is required for both of these problems?

Posted on 2017-10-26 18:41:00 in Chemistry by TREVOR

Ethanol (C2H5OH) melts at -114 ∘C and boils at 78 ∘C. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heat of solid and liquid ethanol are 0.97 J/g⋅K are 2.3 J/g⋅K respectively. 


1. 
How much heat is required to convert 50.0 g of ethanol at 25 ∘C to the vapor phase at 78 ∘C? 

2. How much heat is required to convert 50.0 g of ethanol at -151 ∘C to the vapor phase at 78 ∘C?

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