Question

100g of water is heated from 30°C to 50°C ignoring the slight expansion of the water , the change in its internal energy is (specific heat of water is 4184J/kg/K)​

Answer 1

Answer:

2.1 kJ

4.2 kJ

8.4 kJ

84 kJ

Answer

ΔQ = MSΔT = 100 x 10-3 x 4.184 x 20 = 8.4 X 103

ΔQ = 84 kJ, ΔW = 0

ΔQ = ΔV + ΔW

V = 8.4 kJ

The correct option is C.

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Answer 2

Explanation:

As work done = 0

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