30g water at 30°C is mixed with 1g of steam at 100℃. Calculate the final temperature of the mixture. Sw = 1cal/ g°C, Lvap= 540cal/g.

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30g water at 30°C is mixed with 1g of steam at 100℃. Calculate the final temperature of the mixture. S<sub>w</sub> = 1cal/ g°C, L<sub>vap</sub>= 540cal/g.