Due to the presence of salt in ice the melting point.
Increase from 0 to -22°C
Decreases from 0 to -22°C
Increase from 0 to 22°C
Decreases from 22 to 0°C
Which of the following represents the cooling curve of naphthalene?
1300 J of heat energy is supplied to raise the temperature of 0.5 kg lead from 20° C to 40° C. Calculate the specific heat capacity of lead?
130 Jkg-1k-1
1300 Jkg-1k-1
120 Jkg-1k-1
1200 Jkg-1k-1
What is the range of water in plants and animal body?
60 - 70 %
70 - 80%
80 - 90%
90 - 100%
From the following which is the principle of mixtures ?
Heat energy lost by the hot body = Heat energy gained by the cold body
Heat energy lost by the cold body = Heat energy gained by the hot body
Heat energy gained by the hot body = Heat energy lost by the cold body
Both (2) and (3)
What is the unit of heat capacity?
J / k / mol
J / mol
J k
J / k
In change of phase of a substance at a constant temperature, the energy supplied is used up in:
Increasing the average kinetic energy of its molecules
Decreasing the average kinetic energy of its molecules
Decreasing the potential energy of its molecules
Increasing the potential energy of its molecules
What is the SI unit of specific latent heat?
Cal g-1
Cal g-1 k-1
J kg-1
J kg-1 k-1
Calculate the heat energy required to raise the temperature of 2 kg of water from 10°C to 50°C. Specific heat capacity of water is 4200 Jkg-1k-1 .
3360 J
336 J
336000 J
33600 KJ
The specific heat capacity of aluminium is 1.2 cal/g/°C.Its value in J/kg/K will be:
5.04 x 103
1.2 x 103
4.2 x 103
3.5 x 103
