Water weighing 2 kg heats up from 14 to 50 degrees find the amount of heat expended.

We find by the formula for the specific heat capacity:
Q = cm (t2-t1)
Q = 4200 * 2 * (50-14) = 8400 * 36 = 302400 J = 302.4 kJ
Answer: Q = 302400 J = 302.4 kJ



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