eg. CaO + H2O ---> calcium hydroxide + heat.
so, which form has changed to heat?????????????????
PLEASE HELP ME...
2006-11-08 00:40:37 · 3 answers · asked by nuny 1 in Science & Mathematics ➔ Chemistry
When reactions occur, bonds (electron configurations) try to attain a lower, more stable energy level, given current conditions. When an electron or pair of electrons attains a lower energy level, the excess energy is given off as heat or light. This balances the energy equation for the atoms involved.
2006-11-08 01:02:11 · answer #1 · answered by Radagast97 6 · 0⤊ 0⤋
Because bonds are being formed to make the calcium hydroxide, the gives out energy in the form of heat.
If the opposite were true, ie a reaction were bonds had to be made, this takes in energy because energy is required to actually make the bonds.
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2006-11-08 08:44:21 · answer #2 · answered by Anonymous · 0⤊ 0⤋
By breaking and reforming new bonds the system is made more stable and the excess energy is released as heat.
2006-11-08 08:42:59 · answer #3 · answered by Chad P 3 · 0⤊ 0⤋