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Energy is provided to a liquid at its boiling point at a rate of P joules per second. The rate at which mass is boiling away is μ kg per second. What is the specific latent heat of vaporisation of the liquid? 

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Important Questions on Thermal Physics

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Diploma
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Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 3
All the following are assumptions of the kinetic theory of gases, except which one ? 
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Diploma
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Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 5
The temperature of an ideal gas of pressure 200 kPa is increased from 27oC to 54oC at constant volume. Which is the best estimate for the new pressure in kPa of the gas? 
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Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 6
A container of an ideal gas that is isolated from its surroundings is divided into two parts. One part has double the volume of the other. The pressure in each part is P and the temperature is the same. The partition is removed. What is the pressure in the container now? 
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Diploma
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Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 8
The temperature of an ideal gas is doubled. The average speed of the molecules increases by a factor of
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Diploma
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Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 9
Two ideal gases X and Y are kept at the same temperature. The gas X has molar mass μx and gas Y has molar mass μy. What is the ratio of average speeds of the molecules of gas X to that of gas Y? 
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Diploma
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Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 10
The pressure of a fixed quantity of ideal gas is doubled. The average speed of the molecules is also doubled. The original density of the gas is ρ. Which is the new density of the gas? 
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Diploma
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Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 12
Define what is meant by specific heat capacity of a substance.
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Diploma
IMPORTANT
Physics for the IB Diploma 6th Edition>Chapter 3 - Thermal Physics>Exam-style questions>Q 12
Consider two metals that have different specific heat capacities. The energies required to increase the temperature of 1 mole of aluminium and 1 mole of copper by the same amount are about the same. Yet the specific heat capacities of the two metals are very different. Suggest a reason for this.