Question

20g of ice at -40°C is in a vessel of water equivalent 15g .Find the energy required to raise the temperature to +30°C

Answer 1

Dear Student ,
Here in this case ,
$$\begin{gathered} W=ms \\ \Rightarrow 15=20\times s \\ \Rightarrow s=\frac{15}{20}=0·75cal/gm°C \\ Nowamountofheatrequiredtoraisethetemperature-40°Cto+30°Cis, \\ Q=ms∆t=20\times 0·75\times 70=1050cal \end{gathered}$$
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