AIEEE 2004 | Heat and Thermodynamics Question 469 | Physics

Two thermally insulated vessels $$1$$ and $$2$$ are filled with air at temperatures $$\left( {{T_1},{T_2}} \right),$$ volume $$\left( {{V_1},{V_2}} \right)$$ and pressure $$\left( {{P_1},{P_2}} \right)$$ respectively. If the value joining the two vessels is opened, the temperature inside the vessel at equilibrium will be

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

$$\left( {{T_1} + {T_2}} \right)/2$$

$${{T_1} + {T_2}}$$

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

AIEEE 2004

MCQ (Single Correct Answer)

-1

Time taken by a $$836$$ $$W$$ heater to heat one litre of water from $$10{}^ \circ C$$ to $$40{}^ \circ C$$ is

$$150$$ $$s$$

$$100$$ $$s$$

$$50$$ $$s$$

$$200$$ $$s$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

Which of the following statements is correct for any thermodynamic system ?

The change in entropy can never be zero

Internal energy and entropy and state functions

The internal energy changes in all processes

The work done in an adiabatic process is always zero,

AIEEE 2003

MCQ (Single Correct Answer)

-1

Out of Syllabus

A carnot engine takes $$3 \times {10^6}$$ cal. of heat from a reservoir at $${627^ \circ }C,$$ and gives it to a sink at $${27^ \circ }C$$. The work done by the engine is

$$4.2 \times {10^6}J$$

$$8.4 \times {10^6}J$$

$$16.8 \times {10^6}J$$

zero

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