AIEEE 2004 | Heat and Thermodynamics Question 433 | 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

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

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio $${C_p}/{C_V}$$ for the gas is

$${4 \over 3}$$

$$2$$

$${5 \over 3}$$

$${3 \over 2}$$

AIEEE 2003

MCQ (Single Correct Answer)

-1

The earth radiates in the infra-red region of the spectrum. The spectrum is correctly given by

Rayleigh Jeans law

Planck's law of radiation

Stefan's law of radiation

Wien's law