A metal of mass 1 kg at constant atmospheric pressure and at initial temperature `20^@C` is given a heat of 20000J. Find the following
(a) change in temperature,
(b) work done and
(c) change in internal energy.
(Given, specific heat `=400J//kg-^@C`, cofficient of cubical expansion, `gamma=9xx10^-5//^@C`, density `rho=9000kg//m^3`, atmospheric pressure `=10^5N//m^2`)

A cylinder of mass 1kg is given heat of 20,000J at atmospheric pressure. If initially the temperature of cylinder is 20^@C , find (a) final temperature of the cylinder. (b) work done by the cylinder. (c) change in internal energy of the cylinder (Given that specific heat of cylinder= 400Jkg^-1^@C^-1, Atmospheric pressure= 10^5N//m^2 and Density of cylinder= 9000kg//m^3 )

A diatomic gas is heated at constant pressure. If 105J of heat is given to the gas, find (a) the change in internal energy of the gas (b) the work done by the gas.

100g of water is heated from 30^@C to 50^@C . Ignoring the slight expansion of the water, the change in its internal energy is (specific heat of water is 4184J//kg//K ):

200 g of water is heated from 40^(@)C "to" 60^(@)C . Ignoring the slight expansion of water , the change in its internal energy is closed to (Given specific heat of water = 4184 J//kg//K ):

A 1.0 kg bar of copper is heated at atmospheric pressure (1.01xx10^5N//m^2) . If its temperature increases from 20^@C to 20^@C , calculate the change in its internal energy. alpha=7.0xx10^-6//^@C , rho=8.92xx10^3kg//m^3 and c=387J//kg-^@C .

A metal bar of mass 1.5 kg is heated at atmospheric pressure. Its temperature is increased from 30 °C to 60 °C. Then the work done in the process is (Volume expansion coefficient of the metal = 5xx10^(-5)^(@)C^(-1) , density of the metal =9xx10^3kgm^(-3) Atmospheric pressure =1xx10^5Pa )

75 gm of copper is heated to increase its temperature by 10^@ C . If the same quantity of heat is given to 'm' gm of water, to have same rise in temperature is (specific heat of copper = 420 J//Kg-^@ C ).

1 kg of water is heated from 40^(@) C "to" 70^(@)C ,If its volume remains constatn, then the change in internal energy is (specific heat of water = 4148 J kg^(-1 K^(-1))

1.0 m^(3) of water is converted into 1671 m^(3) of steam at atmospheric pressure and 100^(@)C temperature. The latent heat of vaporisation of water is 2.3xx10^(6) J kg^(-1) . If 2.0 kg of water be converted into steam at atmospheric pressure and 100^(@)C temperature, then how much will be the increases in its internal energy? Density of water 1.0xx10^(3) kg m^(-3) , atmospheric pressure = 1.01xx10^(5) Nm^(-2) .