AIEEE 2011 | Heat and Thermodynamics Question 444 | Physics

Three perfect gases at absolute temperatures $${T_1},\,{T_2}$$ and $${T_3}$$ are mixed. The masses of molecules are $${m_1},{m_2}$$ and $${m_3}$$ and the number of molecules are $${n_1},$$ $${n_2}$$ and $${n_3}$$ respectively. Assuming no loss of energy, the final temperature of the mixture is:

$${{{n_1}{T_1} + {n_2}{T_2} + {n_3}{T_3}} \over {{n_1} + {n_2} + {n_3}}}$$

$${{{n_1}T_1^2 + {n_2}T_2^2 + {n_3}T_3^2} \over {{n_1}{T_1} + {n_2}{T_2} + {n_3}{T_3}}}$$

$${{n_1^2T_1^2 + n_2^2T_2^2 + n_3^2T_3^2} \over {{n_1}{T_1} + {n_2}{T_2} + {n_3}{T_3}}}$$

$${{\left( {{T_1} + {T_2} + {T_3}} \right)} \over 3}$$

AIEEE 2010

MCQ (Single Correct Answer)

-1

Out of Syllabus

A diatomic ideal gas is used in a Carnot engine as the working substance. If during the adiabatic expansion part of the cycle the volume of the gas increases from $$V$$ to $$32$$ $$V$$, the efficiency of the engine is

$$0.5$$

$$0.75$$

$$0.99$$

$$0.25$$

AIEEE 2009

MCQ (Single Correct Answer)

-1

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 435 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

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 436 English

Assuming the gas to be ideal the work done on the gas in taking it from $$A$$ to $$B$$ is :

$$300$$ $$R$$

$$400$$ $$R$$

$$500$$ $$R$$

$$200$$ $$R$$

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