A cylinder contains 0.2 m3 of a gas at a pressure of 1 bar and temperature 27°C. If this gas is compressed to 0.02 m3 at a pressure of 20 bar, the temperature at the end of compression will be: 

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SSC JE Mechanical 16 Nov 2022 Shift 2 Official Paper
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  1. 540°C
  2. 270°C
  3. 327°C
  4. 600°C

Answer (Detailed Solution Below)

Option 3 : 327°C
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Detailed Solution

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Explanation:

Assumption:

As there is no mention of the polytropic index in the question, it is recommended to assume the gas under consideration as an ideal gas.

General Gas Equation:

For every ideal gas, the following equation holds true.

PV = nRT

This equation can also be written as \({PV \ \over T} = Constant\)

Calculation:

Given:

In the given data, P1 = 1 bar, V1 = 0.2 m3, T1 = 27 °C = 300 K, P2 = 20 bar, V2 = 0.02 m3

Therefore,  \(T_2 = {P_2\times V_2\times T_1\ \over P_1\times V_1}\)

\(T_2 = {20 \times 0.02 \times 300\ \over 1 \times 0.2}\)

T2 = 600 K = 327 °C

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