A gas at pressure PNm\(^{-2}\) and temperature 27°C is heated to 77°C at constant volume. The new pressure is

  • A 0.85 PN-m-2
  • B 0.86 PN-m-2
  • C 1.16 PN-m-2
  • D 1.18 PN-m-2
  • E 2.85 PN-m-2
jamb 1978physics

The correct answer is C. 1.16 PN-m-2

At constant volume,

\(\frac{P_1}{T_1}\) = \(\frac{P_2}{T_2}\)

\(\frac{P}{27 +273}\) = \(\frac{P_2}{77 + 273}\)

\(300P_2 = 350P\)

P2 = 1.16 PNm\(^{-2}\)

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