Question

The formula shown below is used to calculate the energy released when a specific quantity of fuel is burned. Calculate the energy released by a burning sample of fuel if the temperature of 100g of water was raised by 20 °C. (Specific heat capacity of water = 4200J/kg °C)

Answer 1

"specific heat capacity of water"

Step-by-step explanation:

Answer 2

Answer: 8400 J

Step-by-step explanation:

The formula referenced in the question is:

`Q=m. c. \Delta T`

Where:

`Q` is the thermal energy

`m=100g (1 kg)/(1000 g)=0.1 kg` is the mass of the water sample

`c=4200 (J)/(kg\°C)` is the specific heat capacity of water

`\Delta T=20\°C` is the variation in temperature

Solving:

`Q=(0.1 kg)(4200 (J)/(kg\°C))(20\°C)`

`Q=8400 J` This is the thermal energy released