DP Physics (last assessment 2024)

Question 18M.3.SL.TZ2.7d.i

Date	May 2018	Marks available	[Maximum mark: 2]	Reference code	18M.3.SL.TZ2.7d.i
Level	SL	Paper	3	Time zone	TZ2
Command term	Sketch	Question number	d.i	Adapted from	N/A

d.i.

[Maximum mark: 2]

18M.3.SL.TZ2.7d.i

A cylinder is fitted with a piston. A fixed mass of an ideal gas fills the space above the piston.

M18/4/PHYSI/SP3/ENG/TZ2/07._01

The gas expands isobarically. The following data are available.

$\begin{array}{*{20}{l}} {{\text{Amount of gas}}}&{ = 243{\text{ mol}}} \\ {{\text{Initial volume of gas}}}&{ = 47.1{\text{ }}{{\text{m}}^3}} \\ {{\text{Initial temperature of gas}}}&{ = -12.0{\text{ °C}}} \\ {{\text{Final temperature of gas}}}&{ = + 19.0{\text{ °C}}} \\ {{\text{Initial pressure of gas}}}&{ = 11.2{\text{ kPa}}} \end{array}$

The gas returns to its original state by an adiabatic compression followed by cooling at constant volume.

(d.i)

Sketch, on the pV diagram, the complete cycle of changes for the gas, labelling the changes clearly. The expansion shown in (a) and (b) is drawn for you.

[2]

Markscheme

concave curve from RHS of present line to point above LHS of present line

vertical line from previous curve to the beginning

M18/4/PHYSI/SP3/ENG/TZ2/07.d.i/M

[2 marks]

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Option B: Engineering physics

Option B: Engineering physics » Option B: Engineering physics (Core topics) » B.2 – Thermodynamics

Option B: Engineering physics » Option B: Engineering physics (Core topics)

Question 18M.3.SL.TZ2.7d.i

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