Help please..Calculate the enthalpy change, ΔH, for the process in which 38.7g of water is converted from liquid at 19.5∘C to vapor at 25.0∘C .
For water, ΔHvap = 44.0kJ/mol at 25.0∘C and s = 4.18J/(g⋅∘C) for H2O(l)
Express your answer numerically in kilojoules.

Question

Help please..Calculate the enthalpy change, ΔH, for the process in which 38.7g of water is converted from liquid at 19.5∘C to vapor at 25.0∘C .
For water, ΔHvap = 44.0kJ/mol at 25.0∘C and s = 4.18J/(g⋅∘C) for H2O(l)
Express your answer numerically in kilojoules.

joannablackwelder · Answer

Enthalpy change is the change in internal energy. We have both a temp change and a phase change, so we will need to calculate the energies to make those changes happen separately and then add them together.