A coper block of mass 2.5 kg is heated in a furnace to a temperature of `500 ^@C` and then placed on a large ice block. What is the maximum amount of ice that can melt? (specific heat of copper ` = 0.39 J g^-1 C^-1`, heat of fusion of watter =`335 J g^-1`).

A thermocole box is a cheap and effieicnet method for storing small quantity of cooked food in summer in particular. A cubical box of side 30 cm has a thickness of 5 cm. If 4 kg of ice are put in a box. Estimate the amount of ice remaining after 6 h. The outside temperature 45^@C , and coefficient K = 0.01 J s^-1 m^-1 k^-1 [Heat of fusion of water = 335 xx 10^3 J kg^-1] .

Find the amount of heat required to convert 1g ice at 0^@ C into steam at 100^@ C .

A 10 kW drilling machine is used to drill a bore in a small aluminium block of mass 8.0 kg. How much is the rise in temperature of the block in 2.5 minutes, assuming 50% of power is used up in heating the machine itself or lost to the surroundings. Specific heat of aluminium = 0.91 J g^-1 ^@C^-1

A geyser heats water flowing at the rate of 3.0 litres per minute from 27 ^@C to 77 ^@C . If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0 xx 10^4 J//g ?

5 moles of oxygen are heated at constant volume from 10^@C ot 20^@C .What will be the change in the internal enregy of the gas?The molar specific heat of oxygen at constant pressure is C_p=7.03 cal mol^(-1) deg^-1 and R=8.36 Joule mol^(-1) "^oC^(-1) .

0.32 g of oxygen is kept in a rigid container and is heated .Find the heat energy needed to raise the temperature from 25^@C to 35^@C .The molar heat capacity of oxygen at constant volume is 20 J mol^(-1) K^(-1) .

The opposite faces of a cubical block of iron and cross-section 4 sq. cm are kept in contact with steam of melting ice. Calculate the amount of ice melted at the end of 10 minutes if K = 0.2 cal cm^-1s^-1C^-1 for iron.

A hole is drilled in a copper sheet. The diameter of the hole is 4.24 cm at 27^@C . What is the change in the diameter of the hole when the sheet is heated to 227^@C ? Coefficient of linear expansion of copper = 1.70 xx 10^5 ^@C^-1 .