Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 1.45 kg of water decreased from 109 °C to 40.5 °C. PropertyValueUnitsMelting point0°CBoiling point100.0°CΔHfus6.01kJ/molΔHvap40.67kJ/molcp (s)37.1J/mol · °Ccp (l)75.3J/mol · °Ccp (g)33.6J/mol · °C kJ

The change in energy is calculated as shown below:

Answered: Based on the thermodynamic properties…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy

Section: Chapter Questions

Problem 102SCQ

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Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 1.45 kg of water decreased from 109 °C to 40.5 °C.

Property	Value	Units
Melting point	0	°C
Boiling point	100.0	°C
ΔH_fus	6.01	kJ/mol
ΔH_vap	40.67	kJ/mol
c_p (s)	37.1	J/mol · °C
c_p (l)	75.3	J/mol · °C
c_p (g)	33.6	J/mol · °C

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