Question

which one of the following is an endothermic process?1.ice melting 2.water freezing 3.a boiling soup 4.the reaction of HCl and NAOH,temperature increases

Answer 1

water freezing.
For ice melting, it releases more energy than it absorbs. The reverse for water freezing.
Not sure for the boiling soup. For all neutralization, it is exothermic

Answer 2

how ice melting be exothermic..???

Answer 3

molecules are separate apart and energy releases, i think...

Answer 4

*separated

Answer 5

but its melting process...it requires energy....if it releases energy then it will be spontaneous process....

Answer 6

for every reaction, it requires energy. To determine whether it is endothermic or exothermic, it depends on the energy released. If energy released is greater than the energy absorbed , it is exothermic, and vice versa

Answer 7

for example, for Haber process, you need energy for N2 and H2 to react, but after the reaction, N2 and H2 form a compound and releases more energy than it has absorbed. So Haber process is an exothermic reaction