Energetics

Question 1

Enthalpy change definition

Answer 1

The heat energy transferred in a reaction at constant pressure

Question 2

Give two examples of exothermic reactions

Answer 2

Combustion and respiration

Question 3

Give two examples of endothermic reactions

Answer 3

Thermal decomposition and photosynthesis

Question 4

Standard enthalpy of formation

Answer 4

Enthalpy change when one mile of a compound is formed from its elements in standard states under standard conditions

Question 5

Standard enthalpy of combustion

Answer 5

Enthalpy change when one mole of a compound is completely burned in oxygen under standard conditions

Question 6

Standard conditions

Answer 6

100kPa

298K