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# Thermodynamic Processes

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1. a volume of 20 cu ft of air at pressure of 50 psig is heated and expanded to 30 cu ft and 40psig find the change in the energy of air in joules.
(A)35564 j
(B) 48219 j
(C)123378 j
(d)167278j

2>A quantity of gas equal to 35 cu ft is to be expanded adiabatically.It has specific heat at constant pressure of 0.532 and constant volume of 0.408.what is the value of exponential power k?
(a)0.124
(b)0.217
(c) 0.94
(d)1.30

https://brainmass.com/chemistry/physical-chemistry/energy-changes-due-pressure-temperature-changes-184194

#### Solution Preview

The solution file is attached.

1. a volume of 20 cu ft of air at pressure of 50 psig is heated and expanded to 30 cu ft and 40psig find the change in the energy of air in joules.
(A) 35564 j
(B) 48219 j
(C) 123378 j
(d) 167278 j

V1 = 20 cft = 20 * ...

#### Solution Summary

The energy changes due to pressure and temperature changes are determined. Neat and step-by-step solutions to both the questions.

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## Simple Ways of Expanding in thermodynamic processes

Please see attached file for full problem.

Simple Ways of Expanding

Part A
What type of process does curve OA represent?
B) isobaric
C) isochoric
D) isothermal

Part B
What type of process does curve OC represent?
B) isobaric
C) isochoric
D) isothermal

Part C
The pressure of the system in state B is ________ the pressure of the system in state O.
A) greater than
B) less than
C) equal to

Part D
The work done by the system is ________.
A) greater than zero
B) less than zero
C) equal to zero

Part E
The temperature of the system in state B is ________ the temperature of the system in state O.
A) greater than
B) less than
C) equal to

Part F
The internal energy of the system in state B is ________ the internal energy of the system in state O.
A) greater than
B) less than
C) equal to

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