5 g of four different fuels are ignited and positioned beneath a beaker holding $50\text{ cm}^3$ of water. The water temperature is measured at the beginning and again after five minutes. Which fuel gives out the most energy?
- Astart $15^\circ\text{C}$, after five minutes $23^\circ\text{C}$
- Bstart $21^\circ\text{C}$, after five minutes $31^\circ\text{C}$
- Cstart $28^\circ\text{C}$, after five minutes $47^\circ\text{C}$
- Dstart $30^\circ\text{C}$, after five minutes $48^\circ\text{C}$