IB Chemistry Topic 5 latest update graded A+

IB Chemistry Topic 5 latest update graded A+ Enthalpy ️️The amount of heat released (exothermic) or absorbed (endothermic) during a chemical reaction (the energy needed for the reaction to occur) This can be lowered with the presence of a catalyst. Change in Enthalpy ️️Hproducts -Hreactants Specific heat equation ️️c= q in Joules (or Change in H)/mass(g)(change in temp) Specific heat of water ️️4.18 J/gdegreesC **NOTE: Usually in kJ Endothermic v. Exothermic ️️Endothermic: Absorbing energy/heat from surroundings Breaking bonds is endothermic In an endothermic reaction, the reactants are more stable Exothermic: Releasing Energy Forming bonds Products are more stable Bond Enthalpy ️️A measure of the strength of a covalent bond