Question

Molar specific heat of water is C = 74.7 J/mol K, its value in cal/g K is ______. 

Options

• 2

• 10

• 17

• 1

Answer 1

Molar-specific heat of water is C = 74.7 J/mol K, its value in cal/g K is 1. 

Explanation:

1 cal = 4.2 J

1 mole of water = (2 + 32) = 18g

∴ C = `(74.4/(18 xx 4.2)) "cal"/"g" "K"`

C= 1 cal/g K