1.

True or False – if false give the correct statement1. Heat is the transfer of energy between two objects with different temperature.2. When ice changes into a liquid, it absorbs energy.3. Heat energy flows from a body at low temperature to a body at higher temperature.4. J/Kg °C is the unit of specific heat capacity.5. Conductors have generally high specific heat capacities and insulators have low specific heat capacities.6. Temperature is a measure of average kinetic energy of molecules.7. When a liquid evaporates, it gives off energy.8. When a liquid boils, energy is absorbed.9. Water has the lowest specific heat capacity.10. While a substance is undergoing a change of state, the temperature of the body remains the same.11. In summer, we prefer light – colored clothes and in winter we usually wear dark – colored clothes.12. The transfer of heat by radiation does not require any medium.13. Metals like copper, aluminium are good conductors of heat and electricity.14. In thermos flask, the vacuum between the two walls prevents heat from the inside to the outside by radiation.15. Thermostat is a device can measure the heat capacity of the liquid in the container.

Answer»

1. True

2. True

3. False 

Correct statement: Heat energy flows from a body at high temperature to a body at lower temperature.

4. True

5. False 

Correct statement: Conductors have generally low specific heat capacities and insulators have high specific heat capacities.

6. True

7. False 

Correct statement: When a liquid evaporates, it absorbs energy.

8. True

9. False 

Correct statement: Water has the very high specific heat capacity.

10. True

11. True

12. True

13. True

14. False 

Correct statement: In thermos flask, the vacuum between the two walls prevents heat from the inside to the outside by conduction and convection.

15. False 

Correct statement: Calorimeter is a device can measure the heat capacity of the liquid in the container.



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