QJEEM11Ph4049: JEE Main 2011 Physics - Class 11 JEEM11Ph4049 Solution: 100 g of water is heated from 30 ∘ C to 50 ∘ C . Ignoring the…

Question

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100 g

of water is heated from

30^{\circ} C

to

50^{\circ} C

. Ignoring the slight expansion of the water, the change in its internal energy is (specific heat of water is

4184

J / k g / K

):

Accepted Answer

Δ U = Δ Q = m c Δ T

= 100 \times 10^{- 3} \times 4184 (50 - 30) \approx 8.4 k J

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