In a particular stress relieving process, a vessel which was 3/4 filled with water at 19 degrees celcius was then completely filled with water in such a way that the final temperature of the water in the vessel doubled. Calculate the temperature of the water that was added.
From the thermal equilibrium: 3/4 mc(2T-T)=1/4 mc(T'-T) 3/4 (T)=1/4 (T'-T) (T'-T)=3T T^'=4T=4(19)=76℃
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