DP Chemistry (first assessment 2025)

Question 19N.2.SL.TZ0.6a(iii)

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.2.SL.TZ0.6a(iii)
Level	SL	Paper	2	Time zone	TZ0
Command term	Calculate	Question number	a(iii)	Adapted from	N/A

a(iii).

[Maximum mark: 1]

19N.2.SL.TZ0.6a(iii)

(a(iii))

Calculate the pressure, in kPa, of this gas in a 10.0 dm³ air bag at 127°C, assuming no gas escapes.

[1]

Markscheme

« $p = \frac{{0.409{\text{mol}} \times {\text{8}}{\text{.31 J }}{{\text{K}}^{ - 1}}{\text{mo}}{{\text{l}}^{ - 1}} \times \left( {127 + 273} \right){\text{K}}}}{{{\text{10}}{\text{.0 d}}{{\text{m}}^3}}}$ » = 136 «kPa» ✔

Syllabus sections

Structure 1. Models of the particulate nature of matter » Structure 1.5—Ideal gases » Structure 1.5.3—The molar volume of an ideal gas is a constant at a specific temperature and pressure. Investigate the relationship between temperature, pressure and volume for a fixed mass of an ideal gas and analyse graphs relating these variables.

Question 19N.2.SL.TZ0.6a(iii)

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