1.

100 grams of water is heated from 30 degrees Celsius to 50 degrees Celsius ignoring the slught expansion of water the change in its internal energy is

Answer»

ΔQ = MSΔT = 100 x 10^-3x 4.184 x20= 8.4 X 10^3

ΔQ = 84 kJ, ΔW = 0

ΔQ = ΔV + ΔW

V = 8.4 kJ



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