Heat Energy-10

A 250 g aluminium ball is cooled from 80°C to 25°C. Specific heat capacity of aluminium ball is 897 J kg⁻¹ C⁻¹. What is the amount of heat energy liberated?

• 12333.75 J
• 10333.75
• 9666.50 J
• 6222.25 J

Same amount of heat is supplied to four bodies of same material A, B, C and D of masses 5kg, 15 kg, 10 kg and 20 kg respectively. Which body will attain the highest temperature? 

• A
• B
• C
• D

Which one of these also depends on mass of the body?

• Heat capacity
• Specific heat capacity

Which of the following statements is incorrect regarding thermal equilibrium?

• At thermal equilibrium, there is no net flow of heat.
• At thermal equilibrium, both the bodies attain same temperature.
• At thermal equilibrium, heat energy stops flowing between two bodies.
• At thermal equilibrium, the rate of flow of heat energy from one body to another becomes the same.

Which of the following changes of states represents sublimation?

• Solid → Liquid
• Liquid → Gas
• Gas → Solid
• Liquid → Solid

During the process of melting, it has been observed that the temperature remains constant until all solid melts to liquid. The solid substance absorbs heat energy without showing any rise in temperature. This heat energy is called latent heat.

• increasing the size of the particles
• increasing the kinetic energy of the particles
• increasing the potential energy of the system
• overcoming the particle-particle attraction force

Which of the following substances expands the most after being heating for the same duration of time?

• Carbon dioxide
• Water
• Copper
• Oil

Two engines, A and B are given a heat supply of 1600 J individually. If the work done by engine A is 400 J and the efficiency of engine B is greater than it by 10%, then what is the work done by engine B?

• 240 J
• 400 J
• 560 J
• 800 J