heat energy required = q
q = m x S x dT
Given that, m = 0.60 kg = 600 g
S = 0.235 J.g-1.K-1
dT = -0.4-(-5.6) = 5.2 K
Now, q = 600 x 0.235 x 5.2 = 733.2 J
=> q = 0.73 kJ <<<<<<-----(ANSWER)
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