Specific heat capacity of a substance X is 1900 J kg⁻¹ °C⁻¹ means:

(a) Substance X absorbs 1900 J for 1°C rise in temperature

(b) 1 kg of substance X absorbs 1900 J heat for 1°C rise in temperature

(c) 1 kg of substance X absorbs 1900 J heat to increase the temperature

(d) 1 kg of substance X absorbs 1900 J heat to cool down by 1°C

Specific latent heat of a substance: (a) is directly proportional to the mass (b) is directly proportional to the change in the temperature (c) depends on the material (d) is inversely proportional to the mass

Calculate the total amount of heat energy required to melt 200 g of ice at 0°C to water at 100°C. (Specific latent heat of ice = 336 J g−1, specific heat capacity of water = 4.2 J g−1 °C−1)

(a) State the principle of calorimetry. (b) Name the material used for making a calorimeter. (c) Write one characteristic property of the material chosen for making a calorimeter.

Thermal capacities of substances A and B are same. If mass of A is more than mass of B then: (a) Which substance will have more specific heat capacity? (b) Which substance will show greater rise in temperature if the same amount of heat is supplied to both?

A metal piece of mass 5 g has thermal capacity 2.5 J K⁻¹. If the mass of the metal is tripled, then its specific heat capacity will be : (a) 7.5 J K⁻¹ (b) 2.5 J K⁻¹ (c) 1.5 J g⁻¹ K⁻¹ (d) 0.5 J g⁻¹ K⁻¹

During the melting of ice at 0°C: (a) energy is released and temperature remains constant (b) energy is absorbed and temperature remains constant (c) energy is absorbed and temperature rises (d) energy is released and temperature falls

Each of the substances given below is supplied with same amount of heat. Which one will attain the highest temperature? Substance Specific heat capacity (cal/g°C) Lead 0.031 Aluminium 0.21 Copper 0.095 Iron 0.115 (a) Aluminium (b) Copper (c) Iron (d) Lead

When the length of a stretched metallic wire is doubled, its specific heat: (a) becomes double (b) becomes four times (c) becomes one-fourth (d) remains the same

The graph given below shows heat energy supplied against change in temperature when no energy is lost to the surrounding. The slope of this graph will give: (a) specific heat capacity (b) specific latent heat of fusion (c) specific latent heat of vaporisation (d) heat capacity

Calculate the amount of heat absorbed by 200 g of paraffin wax to melt completely at its melting point. [Specific latent heat of fusion of paraffin wax = 146 J g⁻¹]

A metal piece of thermal capacity 40 J K−1 absorbs 800 J of heat. Calculate the rise in the temperature of this metal piece.

fHow much heat is required to convert 500 g of ice at 0°C to water at 0°C? The latent heat of fusion of ice is 330 J g−1.