Question

calculate the energy released by conversion of 1g of water into energy, c=3*10⁸m/s​

Answer 1

According to the famous equation of mass-energy conversion:

E=mC^2

Where,

E= energy released or absorbed during reaction

m= mass of particle

C= speed of light or photons= 3*10^8 m/sec

So, using this formulae,

Energy released= [{1*10^(-3)} * (3* 10^8)^2] joules = 9*10^13 joules = 90 TJ.

Basically this energy-mass conversion equation is used in such kind of calculations throughout.

Hope this might answer your doubts.

Thanks and regards.