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Question

When the temperature of a gas in a vessel is increased by 10 C then its pressure is increased by 0.5%. The initial temperature is

A
100 K
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B
200 K
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C
273 K
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D
300 k
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Solution

The correct option is B 200 K
As the process takes place in a vessel the volume remains constant. Thus using Gay-Lussac's law we have PT=constant.
Pressure is increased by 0.5% Thus we get the final pressure as P+0.5100P=P200.Thus the final pressure is P+P200Thus we get
PT=P(1+1200)T+1
or
TT+1=1+1200
or
T=200K

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