Calculate q, w, AE, and AH for the process in which 62.8 g of nitrous oxide (laughing gas, N2O) is cooled from 172°C to 47°C at a constant pressure of 4.00 atm. The molar heat capacity for N20(g) is 38.7 J/°C · mol. q = kJ w = kJ ΔΕ Ξ kJ ΔΗΞ 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.
![**Educational Content: Thermodynamics and Energetics**
**Problem Statement:**
Calculate \( q \), \( w \), \( \Delta E \), and \( \Delta H \) for the process in which 62.8 g of nitrous oxide (laughing gas, \( \text{N}_2\text{O} \)) is cooled from 172°C to 47°C at a constant pressure of 4.00 atm. The molar heat capacity for \( \text{N}_2\text{O} (g) \) is 38.7 J/°C·mol.
**Variables to Determine:**
- \( q = \) _____ kJ
- \( w = \) _____ kJ
- \( \Delta E = \) _____ kJ
- \( \Delta H = \) _____ kJ
**Instructions:**
Use the thermodynamic equations and principles to compute the values of \( q \) (heat), \( w \) (work), \( \Delta E \) (change in internal energy), and \( \Delta H \) (change in enthalpy) for the process described.
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**Note:** This educational problem focuses on applying the first law of thermodynamics and understanding enthalpy changes in gaseous systems when subject to temperature variations at constant pressure.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffa82188d-7c1b-4aa7-8add-9da07b86f459%2F0fec733e-5982-48c6-93f0-3565e522796f%2Fup5i1y8_processed.png&w=3840&q=75)
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