AIEEE 2009 | Heat and Thermodynamics Question 362 | Physics

Two moles of helium gas are taken over the cycle $$ABCD,$$ as shown in the $$P$$-$$T$$ diagram. AIEEE 2009 Physics - Heat and Thermodynamics Question 347 English

The work done on the gas in taking it from $$D$$ to $$A$$ is :

$$+414$$ $$R$$

$$-690$$ $$R$$

$$+690$$ $$R$$

$$-414$$ $$R$$

AIEEE 2009

MCQ (Single Correct Answer)

-1

One $$kg$$ of a diatomic gas is at a pressure of $$8 \times {10^4}\,N/{m^2}.$$ The density of the gas is $$4kg/{m^3}$$. What is the energy of the gas due to its thermal motion ?

$$5 \times {10^4}\,J$$

$$6 \times {10^4}\,J$$

$$7 \times {10^4}\,J$$

$$3 \times {10^4}\,J$$

AIEEE 2008

MCQ (Single Correct Answer)

-1

The speed of sound in oxygen $$\left( {{O_2}} \right)$$ at a certain temperature is $$460\,\,m{s^{ - 1}}.$$ The speed of sound in helium $$(He)$$ at the same temperature will be (assume both gases to be ideal)

$$1421\,\,m{s^{ - 1}}$$

$$500\,\,m{s^{ - 1}}$$

$$650\,\,m{s^{ - 1}}$$

$$300\,\,m{s^{ - 1}}$$

AIEEE 2008

MCQ (Single Correct Answer)

-1

An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume $${V_1}$$ and contains ideal gas at pressure $${P_1}$$ and temperature $${T_1}$$. The other chamber has volume $${V_2}$$ and contains ideal gas at pressure $${P_2}$$ and temperature $${T_2}$$. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be

$${{{T_1}{T_2}\left( {{P_1}{V_1} + {P_2}{V_2}} \right)} \over {{P_1}{V_1}{T_2} + {P_2}{V_2}{T_1}}}$$

$${{{P_1}{V_1}{T_1} + {P_2}{V_2}{T_2}} \over {{P_1}{V_1} + {P_2}{V_2}}}$$

$${{{P_1}{V_1}{T_2} + {P_2}{V_2}{T_1}} \over {{P_1}{V_1} + {P_2}{V_2}}}$$

$${{{T_1}{T_2}\left( {{P_1}{V_1} + {P_2}{V_2}} \right)} \over {{P_1}{V_1}{T_1} + {P_2}{V_2}{T_2}}}$$

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