A metal block absorbs 450 cal of heat when heated from `30^(@)C` to `80^(0)C` its thermal capacity is in cal/^(0)C

A metal block absorbs 4500 cal of heat when heated from 30^@C to 80^@C . Its thermal capacity is

A copper block of mass 500 gm and specific heat 0.1 cal//gm^@C heated from 30^@ C to 290^@ C , the thermal capacity of the block is

Specific heat capacity is expressed in cal // g .^(@) C

Calculate the amount of heat required to con-vert 10 g of ice at 0^(@)C to 10 g of water at 100^(@)C (Specific heat capacity of water =1 cal/g/ ""^(@ )C )

The melting point of a certain substance is 70^(@)C and its normal boiling point is 450^(@)C . Its enthalpy of fusion is 30.0cal//g , enthalpy of vaporisation is 45.0 cal//g and its heat capacity is 0.215 cal g^(-1)K^(-1) . Calculate the heat required to convert 100g of substance from solid state at 70^(@)C to vapour state at 450^(@)C .

5g of a gas is contained in a rigid container and is heated from 15^@C to 25^@C . Specific heat capacity of the gas at constant volume is 0.172 cal g ^(-1)^@C^(-1) and the mechanical equivalent of heat is 4.2 J cal . Calculate the change in the internal energy of the gas.

Calculate the change in internal energy when 5g of air is heated from 0^(@) to 4^(@)C . The specific heat of air at constant volume is 0.172 cal g^(-1) .^(@)C^(-1) .

Suppose that 5 g of helium gas is heated from -30^@C to 120^@C . Find its change in internal energy and the work it does if the heating occurs (a) at constant volume and (b) at constant pressure. For helium, C_v =0.75 cal/g. C^@ and C_p =1.25 cal/g . C^@

Heat absorbed when 1g of ice melts at 0^(@)C to form 1g of water at the same temperature is …………cal.

20g stream at 100°C is passed through 15g ice at -12°C. The mass of water in in calorie metre will be nearly (specific heat of ice =0.5 cal/g°C, specific heat of water=1 cal/g°C latent heat of vaporisation 540 cal/g, latent heat of fusion=80 cal/g and neglect heat capacity of calorimeter )