Thermodynamics Flashcards
1
Q
Define enthalpy change
A
Amount of heat taken in or given out at constant pressure during any physical or chemical change
2
Q
Define standard enthalpy change
A
Change in enthalpy when reactants in their standard states form products that are also in their standard states
3
Q
Define standard state
A
It’s pure most stable form at given temperature at 100kPa
4
Q
What is deltaH
A
Enthalpy change
5
Q
Is exothermic making or breaking bonds
A
Making
6
Q
Is endothermic making or breaking bonds
A
Breaking them
7
Q
Define exothermic
A
When forced of attraction operate
8
Q
Define enthalpy of formation
A
Enthalpy change when 1 mole of a substance is formed from it’s constituent elements with all substances under standard conditions
