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

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.