Enthalpy Changes

Question 1

What are standard conditions?

Answer 1

100kPa
298k

Question 2

In terms on energy describe an endothermic reaction

Answer 2

When energy is taken in from the surroundings, the enthalpy change is positive. This is an endothermic reaction

Question 3

In terms on energy describe an exothermic reaction.

Answer 3

when energy is released into the surroundings enthalpy change is negative. This is an exothermic reaction

Question 4

What is activation energy?

Answer 4

The minimum energy required for a reaction to take place between two colliding reactant particles.

Question 5

Draw an enthalpy profile diagram for an exothermic reaction

Answer 5

Check pmt

Question 6

Draw an enthalpy profile diagram for an endothermic reaction

Answer 6

Check pmt

Question 7

Define the enthalpy change of reaction

Answer 7

The enthalpy change associated with a stated reaction. Quantities of substances in standard states react completely under standard conditions.

Question 8

Define Enthalpy change of formation

Answer 8

The enthalpy change when one mole of a substance is produced from its elements in their standard states under standard conditions.