DP Physics (last assessment 2024)

Question 20N.2.SL.TZ0.3a(i)

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.2.SL.TZ0.3a(i)
Level	SL	Paper	2	Time zone	TZ0
Command term	Calculate	Question number	a(i)	Adapted from	N/A

a(i).

[Maximum mark: 1]

20N.2.SL.TZ0.3a(i)

A sample of vegetable oil, initially in the liquid state, is placed in a freezer that transfers thermal energy from the sample at a constant rate. The graph shows how temperature $T$ of the sample varies with time $t$ .

The following data are available.

Mass of the sample $= 0.32 kg$
Specific latent heat of fusion of the oil $= 130 kJ {kg}^{- 1}$
Rate of thermal energy transfer $= 15 W$

(a(i))

Calculate the thermal energy transferred from the sample during the first $30$ minutes.

[1]

Markscheme

$« 15 \times 30 \times 60 » = 27000 « J »$ ✓

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Core

Core » Topic 3: Thermal physics » 3.1 – Thermal concepts

Core » Topic 3: Thermal physics

Question 20N.2.SL.TZ0.3a(i)

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