Question

A piece of copper is absorbed $2,000$ J of heat and melted completely at melting temperature. If the melting point of the copper is $1,{080}^{o}C$ and its heat of fusion is $200$ kJ/kg. Calculate the mass of the piece of the copper.

• A. $\frac{1}{1,080}$kg
• B. $\frac{1}{540}$kg
• C. $\frac{1}{108}$kg
• D. $\frac{1}{100}$kg
• E. $\frac{1}{50}$kg

Answer 1

Answer: (D)

$\frac{1}{100}$kg

We know that $Q=mL$ where m be the mass of sample and L be the latent heat of the sample.

So, $m=Q/L=\frac{2000}{200\times {10}^3}=1/100kg$