Energy

Question 1

What is the defenition of lattice enthalpy

Answer 1

Energy change when 1 mol. of an ionic lattice is formed from gaseous ions

Question 2

What is the defenition of atomisation

Answer 2

Energy change when 1 mol. of gaseous atoms are formed from its elements in their standard states

Question 3

What is the defenition of enthalpy change of formation

Answer 3

Total enthalpy change when 1 mol. of a compound is formed from its substituent elements under standard conditions

Question 4

What is the definition of enthalpy change of hydration

Answer 4

Enthalpy change when 1 mol. of aqueous ions is formed from 1 mol. of gaseous ions

Question 5

What is the defenition of enthalpy change of solution

Answer 5

Enthalpy change when 1 mol. of a solute is dissolved in sufficent water to from a very dilute solution

Question 6

What is the defnition of standard entropy

Answer 6

Entropy of 1 mol. of a substance under standard conditions

Question 7

What is entropy

Answer 7

Measure of disorder -> measures degree of randomness in a system (system naturally tends towards states of higher entropy)