How much energy is released or absorbed when 40.0 g of steam at 250.0 c is converted to water at 30.0 c?

Answer : The amount of energy released are, -36836.8 J

Solution :

Formula used :

where,

Q = heat or energy released or absorbed = ?

m = mass of water = 40 g

c = specific heat of water =      

= final temperature =

= initial temperature =

Now put all the given values in the above formula, we get

The negative energy means energy is released and positive energy means energy is absorbed.

Therefore, the amount of energy released are, -36836.8 J

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.