How much heat is released when 5 g of water at 20 °C changes into ice at 0 °C?
210 J
5460 J
2000 J
2100 J
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 capacity of a copper vessel of mass 150 g if the specific heat capacity of copper is 410 J/kg/k. How much heat energy will be required to increase its temperature from 25°C to 35°C?
615 J/k , 61.5 J
61.5 J/k , 615 J
615 Cal/°C , 61.5 Cal
61.5 Cal/°C , 615 Cal
Which of the following represents the cooling curve of naphthalene?
What is the temperature of molten wax?
63 °C
80 °C
64 °C
30 °C
What could be the final temperature of a mixture made up of a substance having mass 10 kg and specific heat capacity 1800 J/kg/k and temperature 27°C and a substance having mass 5kg and specific heat capacity 2400 J/kg/k at temperature 21°C?
297.6 K
300 K
297 K
290 K
What is the specific latent heat of fusion of water?
80 Cal g-1
4200 J kg-1
336 J kg-1
2260 J g-1
What is the unit of heat capacity?
J / k / mol
J / mol
J k
J / k
Calculate the amount of heat energy required to raise the temperature of 100 g of copper from 20 °C to 70 °C?
195000 J
1950 kJ
1950 J
19500 kJ
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)
