Explanation:
1000 J= 1 kJ
1. Heat = mass × c × Temperature change
=\(175 g\times 0.79 J/g^oC\times 75^oC=10,368.75 J=10.36878 kJ\approx 10.4 kJ\)
2.Heat = mass × c × Temperature change
=\(352 g\times 1.65 J/g^oC\times 25^oC=14,520 J=14.520 kJ\approx 14.5 kJ\)
3.Heat = mass × c × Temperature change
=\(268 g\times 4.18 J/g^oC\times 40^oC=44,809.6 J=44.8096 kJ\approx 44.8 kJ\)
4.Heat = mass × c × Temperature change
=\(74 g\times 0.21 J/g^oC\times 67 ^oC=1,041.18 J=1.04118 kJ\approx 1.04 kJ\)
