Discuss two factors for choosing cooking fuel and calculate the heat evolved in an experiment with given water volume and temperature change.

• Calorific value: The amount of heat produced per unit mass or volume of the fuel.
• Cost and availability: The economic feasibility and ease of obtaining the fuel.

Given data:
Volume of water ($V$) = $450 \text{ cm}^3$
Initial temperature of water ($T_i$) = $25^\circ \text{C}$
Final temperature of water ($T_f$) = $46.5^\circ \text{C}$
Density of water ($\rho$) = $1 \text{ g/cm}^3$
Specific heat capacity of water ($c$) = $4.2 \text{ kJ/kg K}$ (assuming the given $4.2 \text{ kg/kg K}$ is a typo and should be $4.2 \text{ kJ/kg K}$)