A refrigerator is to maintain, eatables kept inside at `9^@C`. If room temperature is `36^@`C, calculate the coefficient of performance.

When 0.15 kg of ice at 0^@C mixed with 0.30 kg of water at 50^@C in a container, the resutling temperature is 6.7^@C . Calculate the latent heat of fusion of ice. Given S_(water) = 4186J kg^-1 K^-1 .

2.0mol of N_2 gas is kept in a vessel of volume 0.020m^3 and the temperature was maintained at 60^@C . Calculate the pressure of the gas.(Assume that N_2 gas is ideal)

A hot ball of iron weighing 200 g is dropped into 500 g water at 10°C .The resulting temperature is 22.8°C .Calculate the temperature of the ball

A steel tape 1m long is correctly calibrated for a temperature of 27.0 ^@C . The length of a steel rod measured by this tape is found to be 63.0 cm on a hot day when the temperature is 45.0 ^@C . What is the actual length of the steel rod on that day? What Is the length of the same steel rod on a day when the temperature is 27.0 ^@C ? Coefficient of linear expansion of steel = 1.20xx10^-5 K^-1 .

What concentration of nitrogen should be present in a glass of water at room temperature at 25^@C , a total pressure of 1 atm and mole fraction on nitrogen in air of 0.78 [ K_H for nitrogen = 8.42xx10^(-7)M//mmHg ].

A body cools from 60°C to 50°C in 10 min.if room temperature is 25°C ,the temperature of the body at the end of next 10 min will be

The radius of a sphere at 0^@C is 100 cm. when temperature increases the radius becomes 101 cm. Calculate the volume expnassion of the sphere.

A body cools from 80°C to 50°C in 5 minutes.If the temperature of the surrounding is 20°C ,Calculate the time it takes to cool from 60°C to 30°C .