GATE ME 2018 Set 1 — Question 33
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Thermodynamics → Laws & Properties → Carnot Cycle & Entropy
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Question
An ideal gas undergoes a process from state 1 (, ) to state 2 (, ). The specific heats of the ideal gas are : and . The change in specific entropy of the ideal gas from state 1 to state 2 (in kJ/kg-K) is ___________(correct to two decimal places).
Correct answer
0.2 to 0.22
Solution
The change in specific entropy for an ideal gas is given by:
First, calculate the gas constant :
Now, substitute the given values:
Rounding to two decimal places, the change in specific entropy is .
First, calculate the gas constant :
Now, substitute the given values:
Rounding to two decimal places, the change in specific entropy is .
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