(i)
(I) 123 – 120 = 3g or 0.003 kg
(II)
Heat for water
0.070 x 4,200 x 25
= 7,350J
Heat calorimeter
0.05 x 390 x 25
= 487.5J
Total = 487.5 + 7,350 = 7,837.5J
(ii) I. ML + MC? ? = 7837.5
II. 0.003L + 0.003 x 4200 x 70 = 7837.5
0.003L + 882 = 7837.5
L= 2.3185 x 106
Or L= 2.32 x 106J/kg
Wilfykil answered the question on March 26, 2019 at 14:10
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