AP Chem Unit 6 pt2

The heat of ___ (Hrxn) gives the amount of heat exchange when one ___ of the overall reaction is completed.

Answer explanation

The heat of reaction (Hrxn) gives the amount of heat exchange when one mole of the overall reaction is completed.

States are important when given a Hrxn... if the states ___ there will be a change in ___ associated with that, meaning the Hrxn would change. Reverse reactions have the same magnitude of Hrxn but the ___ sign.

Answer explanation

States are important when given a Hrxn... if the states change there will be a change in heat associated with that, meaning the Hrxn would change. Reverse reactions have the same magnitude of Hrxn but the opposite sign.

The chemical ___ energy of the products of a reaction is different from the reactants breaking and forming new ___. The energy difference results in a ___ energy difference, which can be detected as a change in speed.

Answer explanation

The chemical potential energy of the products of a reaction is different from the reactants breaking and forming new bonds. The energy difference results in a kinetic energy difference, which can be detected as a change in speed.

Bond energy (bond ___) is the energy required to separate a ___ chemical ___.

An increase in bond energy indicates ___ attractive forces and a ___ bond, determined by ___ forces.

Answer explanation

Bond energy (bond enthalpy) is the energy required to separate a covalent chemical bond.

An increase in bond energy indicates stronger attractive forces and a shorter bond, determined by Coulombic forces.

We can estimate the potential energy change for a reaction by adding up the ___ ___ for breaking all the ___ in the reactants and then ___ up the bond energies for making all bonds in the ___.

Then you subtract ___ bonds from ___ to get the heat of reaction.

Answer explanation

We can estimate the potential energy change for a reaction by adding up the bond energies for breaking all the bonds in the reactants and then adding up the bond energies for making all bonds in the products.

Then you subtract broken bonds from formed to get the heat of reaction.

Hrxn = ΣH_{(___)} - ΣH_{(___)}

Bond enthalpy is the only change in heat where you do ___ - ___.

So ___ ___ is abbreviated as ▲H^o; The ^o tells us we are dealing with ___ state, which is 1 ___, 1 ___ and typically ___ K.

Answer explanation

Standard enthalpy is abbreviated as ▲H^o; The ^o tells us we are dealing with standard state, which is 1 mole, 1 atm and typically 298 K.

The ___ of formation at the standard state, △H^o, is the ___ change that occurs with the formation of 1 ___ of a substance or ___.

Answer explanation

The energy of formation at the standard state, △H^o, is the heat change that occurs with the formation of 1 mole of a substance or compound.

H is ___ bonded.

N is ___ bonded.

O is ___ bonded.