Question

convert the following energy units a)632 kj to J b)3160 kcal to kj c)6.81x10^6 J to kcal

Answer 1

a) 1 kilo joule is 1000 joule

therefore to convert kilo joule to joule we want to multiply with 1000

that is given below

632 x 1000 = 632000 j

b) one kilocalorie = 4.184 kilojoule

therefore to convert kcal to kj we want to multiply the kilocalorie number with 4.184

that is given below

3160 x 4.184 = 13221 kj

c) 1 joule is equal to 0.000239006 kilocalorie

therefore we want to multiply joule numbers with 0.000239006 to arrive the unit in kilocalorie

6.81 x 10⁶ x 0.000239006 = 1627 kcal