Question

Convert the following energy units. 968 kJ to J 2110 kcal to kJ 7.46 times 10^6 J to kcal

Answer 1

a)

1 KJ = 1000J

so

968 KJ = 968 x 1000 J

= 968000 J

= 9.68 x 10⁵ J

b)

1 Kcal = 4.184 KJ

so

2110 Kcal = 4.184 x 2110 KJ

= 8828.24 KJ

= 8.828 x 10³ KJ

c)

1 J = 0.000239 Kcal

So

7.46 x 10⁶ J = 0.000239 x 7.46 x 10⁶ Kcal

= 2.39 x 10^-4 x 7.46 x 10⁶ Kcal

= 1.782 x 10³ Kcal