definitions

Question 1

define enthalpy change of reaction

Answer 1

the enthalpy change that accompanies the reaction shown by molar quantities in an equation under standard conditions

Question 2

define enthalpy change of formation

Answer 2

the enthalpy change that accompany the formation of 1 mol of a compound from its elements in their standard states under standard conditions.

Question 3

define enthalpy change of combustion

Answer 3

the enthalpy change that accompanies the complete combustion of 1 mol of a substance, where products and reactants are in standard states under standard solutions

Question 4

define the enthalpy change of neutralisation

Answer 4

the enthalpy change the accompanies the formation of 1 mol of water form its ions in a dilute solution

Question 5

equation for enthalpy change of neutralisation

Answer 5

H+(aq) + OH-(aq) –> H2O (l)

Question 6

define enthalpy change

Answer 6

the energy transferred between a system and its surroundings at a constant pressure with the final temperature being equal to the starting temperature