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-TD2-0011 markL1 FoundationCalculatorWork done by a gas

A gas at constant pressure

2.0\times10^5

Pa expands from

1.0\times10^{-3}

m³ to

3.0\times10^{-3}

m³. Calculate the work done by the gas.

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD2-0031 markL1 FoundationCalculatorFirst law

300

J of work is done on a gas, and it loses

120

J of heat to its surroundings. Calculate the increase in its internal energy.

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD2-0041 markL1 FoundationCalculatorFirst law

In the 9702 form of the first law,

\Delta U=q+W

, the term

W

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SA-9702-TD2-0061 markL1 FoundationCalculatorFirst law

A gas is heated in a sealed rigid container. The work done on the gas is

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD2-0091 markL1 FoundationCalculatorWork done by a gas

On a

p

–

V

graph, the work done by a gas during an expansion is

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD2-0121 markL1 FoundationCalculatorFirst law

The first law of thermodynamics is a statement of

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SA-9702-TD2-0022 marksL2 StandardCalculatorFirst law

During the expansion above,

900

J of heat is supplied to the gas. Calculate the increase in internal energy.

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SA-9702-TD2-0051 markL2 StandardCalculatorFirst law

An ideal gas expands isothermally. Which is correct?

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SA-9702-TD2-0071 markL2 StandardCalculatorFirst law

A gas is compressed rapidly (adiabatically) and

250

J of work is done on it. Calculate the change in its internal energy.

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD2-0082 marksL2 StandardCalculatorWork done by a gas

A gas at a constant pressure of

1.0\times10^5

Pa is compressed from

5.0

litres to

2.0

litres. Calculate the work done on the gas.

Salam Academy Original Practice · Proposed mark scheme

SA-9702-TD2-0101 markL2 StandardCalculatorFirst law

A gas is taken through a complete cycle back to its initial state. The total change in its internal energy is

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SA-9702-TD2-0113 marksL3 ExamCalculatorFirst law

0.20

mol of an ideal monatomic gas is heated at a constant pressure of

1.0\times10^5

Pa from

300

K to

400

K. Its volume rises from

4.99\times10^{-3}

m³ to

6.65\times10^{-3}

m³. Calculate the heat supplied. (

R=8.31

J mol⁻¹ K⁻¹)

Salam Academy Original Practice · Proposed mark scheme