chemistry unit 3B January 2012 Q3e

[NAWAR omar]

Chemistry AS Jan 2012 unit 3b
question 3e (ii) effect on the calculated enthalpy change if 3.50g of damp magnesium carbonate were used. ........

 

[Nafis Daiyan]

Chemistry AS Jan 2012 unit 3b
question 3e (ii) effect on the calculated enthalpy change if 3.50g of damp magnesium carbonate were used. ........

Mass of magnesium carbonate would be less. since it is damp, it contains water. The mass of MgCO3 reacting is less than 3.50 grams and so heat produced would be less. Enthalpy change would be less negative.