11th Physics Weekly Test - 2 ( Heat and Thermodynamics )

MABS Institution

11th Physics Weekly Test - 2 ( Heat and Thermodynamics )-Aug 2020

Time : 1.30 Hours

Part - A

Generic 2 - Answer All Question

Define molar specific heat capacities.

A balloon is filled at 27°C and 1 atm pressure by 500 m³ He. Then find the volume of He at - 3°C and 0.5 mm Hg pressure.

A steel rod of length 25 cm has a cross-sectional area of 0.8 cm². Find the force required to stretch this rod by the same amount as the expansion produced by heating it through to°C. (coefficient of linear expansion of steel is 10^-5/^oC and Young's modulus of steel is 2 x 10¹⁰Nm^-2)

In an adiabatic expansion of the air, the volume is increased by 4%, what is percentage change in pressure?
(For air \(\gamma \) = 1.4)

An ideal refrigerator keeps its content at 0°C while the room temperature is 27°C. Calculate its coefficient of performance.

Give the sign convention for Q and W.

Give the equation of state for an isothermal process.

Is it possible that there is a change in temperature of a body without giving/taking heat to from it?

State Kelvin-Planck statement of second law of thermodynamics

An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume V₁ and contains ideal gas at pressure P₁ and temperature T₁. The other chamber has volume V₂ and contains ideal gas at pressure P₂ and temperature T₂. If the partition is removed without doing any work on the gases, calculate the final equilibrium temperature of the container.

Part - B

Generic 5 - Answer All Question

Explain the isobaric process and derive the work done in this process

Estimate the mass of air in your class room at NTP. Here NTP implies normal temperature (room temperature) and 1 atmospheric pressure

What is meant by coefficient of linear expansion superficial & cubical expansion?
When you mix a tumbler of hot water with one bucket of normal water, what will be the direction of heat flow? Justify.

Derive the work done in an isothermal process.

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11th Physics Weekly Test - 2 ( Heat and Thermodynamics )

MABS Institution

11th Physics Weekly Test - 2 ( Heat and Thermodynamics )-Aug 2020

Part - A

Generic 2 - Answer All Question

Define molar specific heat capacities.

A balloon is filled at 27°C and 1 atm pressure by 500 m3 He. Then find the volume of He at - 3°C and 0.5 mm Hg pressure.

A steel rod of length 25 cm has a cross-sectional area of 0.8 cm2. Find the force required to stretch this rod by the same amount as the expansion produced by heating it through to°C. (coefficient of linear expansion of steel is 10-5/oC and Young's modulus of steel is 2 x 1010Nm-2)

In an adiabatic expansion of the air, the volume is increased by 4%, what is percentage change in pressure? (For air \(\gamma \) = 1.4)

An ideal refrigerator keeps its content at 0°C while the room temperature is 27°C. Calculate its coefficient of performance.

Give the sign convention for Q and W.

Give the equation of state for an isothermal process.

Is it possible that there is a change in temperature of a body without giving/taking heat to from it?

State Kelvin-Planck statement of second law of thermodynamics

Part - B

Generic 5 - Answer All Question

Explain the isobaric process and derive the work done in this process

Estimate the mass of air in your class room at NTP. Here NTP implies normal temperature (room temperature) and 1 atmospheric pressure

What is meant by coefficient of linear expansion superficial & cubical expansion?

When you mix a tumbler of hot water with one bucket of normal water, what will be the direction of heat flow? Justify.

Derive the work done in an isothermal process.

Comment

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A balloon is filled at 27°C and 1 atm pressure by 500 m³ He. Then find the volume of He at - 3°C and 0.5 mm Hg pressure.

A steel rod of length 25 cm has a cross-sectional area of 0.8 cm². Find the force required to stretch this rod by the same amount as the expansion produced by heating it through to°C. (coefficient of linear expansion of steel is 10^-5/^oC and Young's modulus of steel is 2 x 10¹⁰Nm^-2)

In an adiabatic expansion of the air, the volume is increased by 4%, what is percentage change in pressure?
(For air \(\gamma \) = 1.4)