Thermochemustry test

What is enthalpy?

Amount of heat per mole

What is enthalpy of formation and the equation?

How much energy it takes a compound to form from its individual elements. Change in enthalpy = enthalpy and number of moles of products - the enthalpy and number of moles of reactants

What is Q?

Heat energy

How to do Hese’s law?

See if anything is the same on products and reactants to cancel out. Put all reactants in one side and all products together on other side. Combine like terms. Add up change In heat

How to do enthalpy problems?

Write given enthalpy for molecules. Multiply by coefficient. Then do products minus reactants

Is Endo or exo positive?

exo is negative and endo is positive

is fusion or freezing negative?

Freezing is negative

Is vaporation or condensation negative?

Condensation is negative

WHat are the two equations for change in heat?

Moles x chnage in heat of fusion or vaporation. So multiply the change in heat times by the number of moles and make it negative if needed