How much heat is absorbed by 15.5 g of water when its temperature is increased from 20.0°c to 50.0°c? the specific heat of water is 4.184 j/(g°

Answer : The heat absorbed by the water is 19.4 kJ

Explanation :

Formula used :

or,

where,

Q = heat absorbed = ?

m = mass of water = 15.5 g

c = specific heat of water =

= initial temperature  =

= final temperature  =

Now put all the given value in the above formula, we get:

Therefore, the heat absorbed by the water is 19.4 kJ

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.