Question

Specific heat of mercury is 0.03cal/gm ⁰C.its value in SI system
a)116
b)126
c)162
d)216
Need explaintion​

Answer 1

$option : (b) \: 126$

Explanation:

$SI \: \: unit \: \: of \: \: Specific \: \: heat \: : \boxed{J/kg°K} \\ \\ we \: \: know \: \: \boxed{1 \: cal = 4.2J , \: \: 1g = {10}^{ - 3} \: kg \: \: \: and \: \: \: ∆°C=∆K } \\ Now, \: \: 0.03 \: cal/g°C \\ \: \: \: \: \: \: \: \: \: \: \: = 0.03 \times 4.2J/ {10}^{ - 3} \: kg°K\\ \: \: \: \: \: \: \: \: \: \: \: \: \: = 0.03 \times 4.2 \times {10}^{3} J/kg°K \\ = \boxed{ 126 \: J/kg°K}$