Energetics Flashcards

1
Q

Calorimetry

A

The process of measuring the amount of energy absorbed or released during a chemical reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Endothermic reaction

A

An endothermic reaction is one that takes in energy from the surroundings so the temperature of the surrounding decreases. In the endothermic reaction, the energy needed to break existing bonds is greater than the energy released from forming new bonds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Enthalpy change

A

The heat energy change measured under conditions of constant pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Exothermic reaction

A

An exothermic reaction is one that transfers energy to the surroundings so the temperature of the surroundings increases. In an exothermic reaction, the energy released from forming new bonds is greater than the energy needed to break existing bonds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Hess’s law

A

The enthalpy change of a reaction is independent of the route taken

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Mean bond enthalpy

A

The enthalpy change when one mole of a specified covalent bond is broken averaged out across the range of compounds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Molar enthalpy change

A

The enthalpy change per mole of substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Standard conditions

A

100kPa and a stated temperature (generally 298K)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Standard enthalpy of combustion

A

The enthalpy change when one mole of a substance is burned in excess oxygen under standard conditions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Standard enthalpy of formation

A

The enthalpy change when one mole of a substance in its standard state under standard conditions is formed from its elements under standard conditions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly