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Q. No.If an ideal gas is compressed isothermally, which of the following statement is true?
| 1. | Energy is transferred into the gas by heat. |
| 2. | Work is done by the gas. |
| 3. | Pressure of the gas decreases. |
| 4. | The internal energy of the gas remains constant. |
Subtopic: Types of Processes |
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Starting with the same initial conditions, an ideal gas expands from volume \(V_1\) to \(V_2\) in three different ways. The work done by the gas is \(W_1\) if the process is purely isothermal, \(W_2\) if the process is purely adiabatic and \(W_3\) if the process is purely isobaric. Then,
| 1. | \(W_1<W_2<W_3\) | 2. | \(W_2<W_3<W_1\) |
| 3. | \(W_3<W_1<W_2\) | 4. | \(W_2<W_1<W_3\) |
Subtopic: Types of Processes |
71%
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JEE
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A cylinder of a fixed capacity of \(44.8\) litres contains helium gas at a standard temperature and pressure. The amount of heat needed to raise the temperature of the gas in the cylinder by \(20.0^\circ \text{C}\) will be: (Given: gas constant R = \(8.3\) JK–1-moI–1)
1. \(249\) J
2. \(415\) J
3. \(498\) J
4. \(830\) J
1. \(249\) J
2. \(415\) J
3. \(498\) J
4. \(830\) J
Subtopic: Types of Processes |
63%
From NCERT
JEE
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