Question

2000 cal of heat is supplied to 200 g of water. Find the rise in temperature. (Specific heat of water = 1 cal ${g^{-1}}^{\circ }{C}^{-1}$)

• A. ${10}^{\circ }C$
• B. ${20}^{\circ }C$
• C. ${30}^{\circ }C$
• D. ${40}^{\circ }C$

Answer 1

The correct option is A ${10}^{\circ }C$

Given , $m=200g,Q=2000cal,\Delta \theta =?,$ , specific heat of water $c=1cal/g{-}^{o}C$

Now , heat required to raise the temperature of water is given by the definition of specific heat ,

$Q=mc\Delta \theta$

or $\Delta \theta =Q/\left(mc\right)=2000/(200\times 1)={10}^{o}C$