Physics-Thermal Physics Online Test

Thermal energy is transferred through the glass windows of a house mainly by


The specific latent heat of vaporization of a substance is the quantity of energy required to


When a gas in a cylinder is compressed at constant temperature by a piston, the pressure of the gas increases. Consider the following three statements.

I. The rate at which the molecules collide with the piston increases.

II. The average speed of the molecules increases.

III. The molecules collide with each other more often.

Which statement(s) correctly explain the increase in pressure?


When a gas in a thermally insulated cylinder is suddenly compressed, the change of state is


Two different objects are in thermal contact with one another. The objects are at different temperatures. The temperatures of the two objects determine


The specific latent heat of vaporization of a substance is greater than its specific latent heat of fusion because


The kelvin temperature of an object is a measure of


The specific latent heat of fusion of a substance is defined as the amount of thermal energy required to change the phase of


The distance between the 0°C and 100°C marks on a mercury-in-glass thermometer is 20 cm. When the thermometer bulb is placed in a mixture of ice and salt, the mercury level is 4 cm below the 0°C mark. The temperature of the mixture is


Some liquid is contained in a shallow dish that is open to the atmosphere. The rate of evaporation of the liquid does not depend on


The equation of state for an ideal gas, pV = nRT, describes the behaviour of real gases


The temperature of an ideal gas is reduced. Which one of the following statements is true?


In one cycle of a heat engine, 300 J of energy is absorbed and 200 J of energy is ejected. The efficiency of the engine is


A gas expands rapidly. The process is approximately


A temperature scale is to be constructed using the property X of a substance. Which of the following must be a characteristic of the property X?


Which of the following is not an assumption on which the kinetic model of an ideal gas is based?


Which of the following is the internal energy of a system?


The equation of state of an ideal gas is

pV = nRT.

In this equation, the constant n is the number of


A liquid is evaporating, causing the liquid to cool.

The temperature of the liquid decreases because


The Kelvin temperature of an ideal gas is a measure of the


The specific latent heat of vaporization of a substance is defined as the amount of thermal energy required to


The second law of thermodynamics states that the entropy of the universe is


Temperature is the only property that determines


The internal energy of a solid substance is equal to the


The heat capacity of a solid body is defined as



































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Thermal Physics for IB DP and AS/A Level Students

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