Question

0.5 g of fuel raised the temperature of 50 g of water by 50 degree Celsius. How much energy does the fuel transfer per gram ?

Answer 1

Answer: 20.93J/g

Explanation:

• The formula to calculate the energy is E=mcΔT, where m is the mass of the water, c is its specific heat and ΔT is change in the temperature.
• Given that m is 0.05kg, ΔT is 50°C and c of water is 4.186J/kg°C.
• E=mcΔT=0.05×50×4.186=10.465J.
• Mass of fuel is 0.5g.
• Energy per mass of fuel is 10.465/0.5=20.93J/g.