O-LevelPhysicsThermal Physics5054/12 · Oct/Nov 2015 · Q191 Mark

An insulated beaker contains 300 g of water, initially at 30°C. Water at 100°C is added until the temperature of the mixture reaches 50°C. The specific heat capacity of water is 4.2 J/(g°C). How much water is added?

A60 g

B120 g

C180 g

D750 g

✓ Correct answer

B: 120 g

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Topic: Thermal Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2015 Paper 1 Variant 2, question 19.

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