Question

A heater of power $PW$ raises the temperature of $mkg$ of a liquid by $\Delta TK$ in time $ts$ . Express the specific heat capacity of liquid in terms of above data

• A. $\frac{Pt}{\Delta T}$
• B. $\frac{Pt(\Delta T+273)}{m{\left(\Delta T\right)}^2}$
• C. $\frac{P}{m\Delta T}$
• D. $\frac{Pt}{m\Delta T}$

Answer 1

Answer: (D)

$\frac{Pt}{m\Delta T}$

Power $P=\frac{Q}{t}J{s}^{-1}$ or watt where t is time in second

$Q=mc\Delta T$

$P=\frac{mc\Delta T}{t}$

$c=\frac{Pt}{m\Delta T}$