January 11

To start class off we corrected the classifying chemical equations and another worksheet. Mr. doktor did a demonstration on burning steel wool and magnesium. When Mr.doktor burnt the steel wool, the part that was in the fire was darker then the rest because the burnt wool was ion oxidized and it does not burn. When he burnt the magnesium, it looked like fireworks, it was very bright. He also passed around ammonia nitrate, he told the class that this was the stuff that is in the heat packs.

Heat in Chemical RxNs

• Reactions that release heat are exothermic
• Reactions that absorb heat heat are edothermic

Heat is a form of energy. All chemicals have stored energy called enthalpy

Enthalpy of water < align="left">