Equal weights of two gases produces equal work on isothermal reversible expansion from same initial volume to the same final volume. The gases should be
A) Cl2, O2
B) CO2, CH4
C) CH4, C2H6
D) NO, C2H6
Answers
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Answer:
Solution
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Correct option is
C
8
Given,
x=1+
2
.
Now,
(x−
x
1
)
3
=(1+
2
−(
1+
2
1
))
3
=[1+
2
−(
2
+1
1
)×(
2
−1
2
−1
)]
3
=[1+
2
−(
2−1
2
−1
)]
3
=[1+
2
−(
2
−1)]
3
=(1+
2
−
2
+1)
3
=2
3
=8.
Therefore, option C is correct.
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