Question

8000J of heat is given to 200g of copper at 20 degree Celsius. Calculate it's final temperature.[sp.heat capacity =0.4j/g degree Celsius.]

Answer 1

Dear student,
By using the formula, to calculate the specific heat,
Q=ms∆T
where Q= heat energy
m= mass of substance
s= specific heat
T= temperature
Putting the values in the above equation
8000 J=200 x 0.4(Tf-Ti)
Where, Tf= final tempaerature
Ti= initial temperature
8000=200 x0.4 (Tf-20)
$$\begin{gathered} \frac{8000}{200\times 0.4}=Tf-20 \\ \frac{8000}{80}=Tf-20 \\ 100+20=Tf \\ So,finaltemperature={120}^{o}C \\ Regards \end{gathered}$$