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Changes of state

Changes of state

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Question 7

An electrical heater of power 45.0 W is placed inside a well-insulated container of liquid nitrogen at its boiling point.

Calculate the mass of nitrogen vaporised when the heater is switched on for 12.0 minutes12.0\text{ minutes}12.0 minutes.

Specific latent heat of vaporisation of nitrogen = 2.00 × 105 J/kg.

A

2.7 g2.7\text{ g}2.7 g

B

162 g162\text{ g}162 g

C

0.162 g0.162\text{ g}0.162 g

D

9720 g9720\text{ g}9720 g

Markscheme

Changes of state Questions

  1. GCSE
  2. /Physics
  3. /Changes of state

27 exam-style questions on OCR GCSE Physics Changes of state. Each one has a worked solution and a mark scheme showing where the marks go.

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