Answer: The energy released will be 114.223 kJ.
Explanation:
To calculate the amount of heat released, we use the formula:
[tex]Q= m\times c\times \Delta T[/tex]
Q = heat gained or released
m = mass of the substance = 1.3kg = 1300 g (Conversion factor: 1kg = 1000g)
c = heat capacity of water = 4.184 J/g K
[tex]\Delta T={\text{Change in temperature}}=(274-295)K=-21K[/tex]
Putting values in above equation, we get:
[tex]Q=1300g\times 4.184J/gK\times (-21)K[/tex]
Q = -114223 Joules = -114.223 kJ (Conversion Factor: 1kJ = 1000J)
Negative sign implies heat released.
Hence, heat released by 1.3 kg of water is 114.223kJ.
