11th Physics Weekly Test - 4 ( Heat and Thermodynamics )

MABS Institution

11th Physics Weekly Test - 4 ( Heat and Thermodynamics )-Aug 2020

Time : 1.30 Hours

Part - A

Generic 3 - Answer All Question

\(\frac { 1 }{ 2 } \)mole of helium is contained in a container at STP. How much heat energy is needed to double the pressure of the gas keeping the volume constant? Heat capacity of gas is 3 J g^-1K^-1

Write the important properties of thermal radiations.

500 g of water is heated from 30°C to 60°C. Ignoring the slight expansion of water, calculate the change in internal energy of the water? (specific heat of water 4184 J/kg.K)

Refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36°C. Calculate the co efficient of performance.

How does the density of a solid or a liquid vary with temperature? State that its variation with temperature is given by P' = P(1 -\(\alpha\)\(\triangle\)T), where y is coefficient of cubical expansion.

Calculate the heat required to convert 0.6 kg of ice at - 20°C, kept in a calorimeter to steam at 100°C atmospheric pressure, Given the specific heat capacity (L_ice) of lee= 2100 Jkg^-1K^-1.

Explain first law of thermodynamics.

How is skating possible on snow?

A steam engine boiler is maintained at 250°C and water is converted into steam. This steam is used to do work and heat is ejected to the surrounding air at temperature 300K. Calculate the maximum efficiency it can have?

Two rods, one of aluminium and the other made of steel having initial length l₁ and l₂ are connected together to form a single rod of length l₁ + I₂ The co-efficient of linear expansion for aluminium steel are aa and as respectively. If the length of each rod increases by the same amount when their temperatures are raised by +^oC, then find the ratio \({l_1 + l_2\over l_1}\)

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11th Physics Weekly Test - 4 ( Heat and Thermodynamics )

MABS Institution

11th Physics Weekly Test - 4 ( Heat and Thermodynamics )-Aug 2020

Part - A

Generic 3 - Answer All Question

\(\frac { 1 }{ 2 } \)mole of helium is contained in a container at STP. How much heat energy is needed to double the pressure of the gas keeping the volume constant? Heat capacity of gas is 3 J g-1K-1

Write the important properties of thermal radiations.

500 g of water is heated from 30°C to 60°C. Ignoring the slight expansion of water, calculate the change in internal energy of the water? (specific heat of water 4184 J/kg.K)

Refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36°C. Calculate the co efficient of performance.

How does the density of a solid or a liquid vary with temperature? State that its variation with temperature is given by P' = P(1 -\(\alpha\)\(\triangle\)T), where y is coefficient of cubical expansion.

Calculate the heat required to convert 0.6 kg of ice at - 20°C, kept in a calorimeter to steam at 100°C atmospheric pressure, Given the specific heat capacity (Lice) of lee= 2100 Jkg-1K-1.

Explain first law of thermodynamics.

How is skating possible on snow?

A steam engine boiler is maintained at 250°C and water is converted into steam. This steam is used to do work and heat is ejected to the surrounding air at temperature 300K. Calculate the maximum efficiency it can have?

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Tamilnadu Stateboardszs - Class

\(\frac { 1 }{ 2 } \)mole of helium is contained in a container at STP. How much heat energy is needed to double the pressure of the gas keeping the volume constant? Heat capacity of gas is 3 J g^-1K^-1

Calculate the heat required to convert 0.6 kg of ice at - 20°C, kept in a calorimeter to steam at 100°C atmospheric pressure, Given the specific heat capacity (L_ice) of lee= 2100 Jkg^-1K^-1.