Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

TopicSkillDifficulty

12 questions

SA-9702-TD1-0012 marksL1 FoundationCalculatorIdeal gas internal energy

Calculate the internal energy of

2.0

mol of an ideal monatomic gas at

300

K. (

R=8.31

J mol⁻¹ K⁻¹)

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD1-0021 markL1 FoundationCalculatorInternal energy

The internal energy of a system is

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SA-9702-TD1-0041 markL1 FoundationCalculatorIdeal gas internal energy

The internal energy of an ideal gas consists only of kinetic energy because

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SA-9702-TD1-0071 markL1 FoundationCalculatorInternal energy

A rise in the temperature of an object indicates an increase in

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SA-9702-TD1-0121 markL1 FoundationCalculatorInternal energy

During boiling at constant temperature, the mean kinetic energy of the molecules

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SA-9702-TD1-0031 markL2 StandardCalculatorInternal energy

When ice melts at

0

°C, its internal energy

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SA-9702-TD1-0051 markL2 StandardCalculatorIdeal gas internal energy

The thermodynamic temperature of a fixed mass of ideal gas is doubled. State the factor by which its internal energy increases.

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SA-9702-TD1-0062 marksL2 StandardCalculatorIdeal gas internal energy

Calculate the increase in internal energy when

0.50

mol of an ideal monatomic gas is heated from

250

K to

350

K. (

R=8.31

J mol⁻¹ K⁻¹)

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD1-0081 markL2 StandardCalculatorInternal energy

Internal energy is described as a "function of state". This means it

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD1-0091 markL2 StandardCalculatorIdeal gas internal energy

Calculate the internal energy of

1.0\times10^{23}

molecules of an ideal monatomic gas at

400

K. (

k=1.38\times10^{-23}

J K⁻¹)

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SA-9702-TD1-0101 markL2 StandardCalculatorInternal energy

Molecules in a solid have negative potential energy because

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SA-9702-TD1-0113 marksL3 ExamCalculatorInternal energy

0.10

kg of water at

100

°C is converted to steam at

100

°C. The steam does

1.7\times10^4

J of work pushing back the atmosphere. Calculate the increase in internal energy, in kJ. (

L_v=2.26\times10^6

J kg⁻¹)

Salam Academy Original Practice · Proposed mark scheme