i) Heat lost by condensing steam = Heat gained by water
$\frac{10}{1000}$ x Lv + $\frac{10}{1000}$ x 4200 x (100 - 70)
= $\frac{100}{1000}$ x 4200 x (70 -20)
Lv = 1,974, 000J/kg
johnmulu answered the question on February 18, 2017 at 08:26
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