Heat and Internal Energy
Physics ⇒ Heat and Thermodynamics
Heat and Internal Energy starts at 7 and continues till grade 12.
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See sample questions for grade 8
A 200 g block of ice at 0°C is melted by adding 67,000 J of heat. (Latent heat of fusion of ice = 334 J/g) How much ice melts?
A 500 g block of copper is heated from 20°C to 70°C. (Specific heat capacity of copper = 0.39 J/g°C) Calculate the heat absorbed.
A beaker of water is heated on a stove. Which method of heat transfer is mainly responsible for heating the water?
A metal block at 80°C is placed in water at 20°C. In which direction will heat flow?
A metal spoon is placed in a cup of hot tea. After a while, the spoon becomes warm. Which method of heat transfer is responsible?
Calculate the amount of heat required to raise the temperature of 100 g of water from 20°C to 30°C. (Specific heat capacity of water = 4.18 J/g°C)
Describe how heat is transferred in a metal rod when one end is heated.
Describe what happens to the internal energy of a gas when it is compressed quickly.
Describe what happens to the internal energy of ice as it melts at 0°C.
Explain what is meant by the internal energy of a substance.
Explain why metals feel colder than wood at the same temperature.
Explain why wearing light-colored clothes is preferable in hot climates.
If you heat a solid, what happens to the motion of its particles?
State the law of conservation of energy as it applies to heat and internal energy.
What happens to the internal energy of a system when it loses heat to the surroundings?
What is the difference between heat and temperature?
