Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 0.450 kg of water decreased from 103 °C to 42.0 °C. NOTE: MOLAR specfic heat capacities (Cp.n) are given here! Property Value Units Melting point °C Boiling point 100.0 °C AHfus 6.01 kJ/mol ΔΗap 40.67 kJ/mol Gp (s) 37.1 J/mol · °C 75.3 J/mol · °C Go (8) 33.6 J/mol · °C kJ
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
![Based on the thermodynamic properties provided for water, determine the energy change when the temperature of 0.450 kg of water decreased from 103 °C to 42.0 °C. **NOTE: MOLAR specific heat capacities (\(c_{p,n}\)) are given here!**
| Property | Value | Units |
|------------------|--------|--------------|
| Melting point | 0 | °C |
| Boiling point | 100.0 | °C |
| \(\Delta H_{fus}\) | 6.01 | kJ/mol |
| \(\Delta H_{vap}\) | 40.67 | kJ/mol |
| \(c_p (\text{s})\) | 37.1 | J/mol·°C |
| \(c_p (\text{l})\) | 75.3 | J/mol·°C |
| \(c_p (\text{g})\) | 33.6 | J/mol·°C |
[ ] kJ
The table outlines the phase transition points and molar specific heat capacities for solid, liquid, and gaseous water. The enthalpy changes for fusion and vaporization are also provided, which are crucial for calculating energy changes during phase transitions. Use these values to compute the energy change for the given conditions.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbc3eda98-838a-48fa-9790-2f190fa845b2%2Fd4e52a77-2b8a-4fc0-830a-765285dabd62%2F11ttlml_processed.png&w=3840&q=75)
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
