# How many calories are required to raise the temperature of 225 g of water from 42°C to 75°C?

Approx. $30 \cdot k J$.
The specific heat capacity of water is $4.12 \cdot J \cdot {K}^{-} 1 \cdot {g}^{-} 1$. This value should have been quoted with the question.
We want the energy required for the transition of the given mass of water at $42$ ""^@C to water at $75$ ""^@C. $\Delta T$ $=$ $33$ ""^@C or $33$ $K$.
Thus $225 \cdot \cancel{g} \times 4.12 \cdot J \cdot \cancel{{K}^{-} 1} \cdot \cancel{{g}^{-} 1} \times 33 \cdot \cancel{K}$ $=$ ??*kJ