What is new gauge pressure?

1.82 atm

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1.70 atm

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1.92 atm

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Solution

The correct option is A 1.92 atm
$\frac{p_{1} V_{1}}{T_{1}} = \frac{p_{2} V_{2}}{T_{2}}$
or $P_{2} = \frac{2.72 \times 150 \times 318}{278 \times 159}$
$= 2.94 a t m$
Gauge pressure $= 2.94 - 1.02$
$= 1.92 a t m$

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