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Question 18N.1.SL.TZ0.10

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.1.SL.TZ0.10
Level SL Paper 1 Time zone TZ0
Command term Question number 10 Adapted from N/A
10.
[Maximum mark: 1]
18N.1.SL.TZ0.10

A 700 W electric heater is used to heat 1 kg of water without energy losses. The specific heat capacity of water is 4.2 kJ kg–1 K–1. What is the time taken to heat the water from 25 °C to 95 °C?

 

A.   7 s

B.   30 s

C.   7 minutes

D.   420 minutes

[1]

Markscheme

C

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