Title	: ENERGETICS

Aim	: To measure and determine enthalpy changes in a reaction.

Apparatus :
measuring cylinder , beaker , Styrofoam cup , thermometer , 0.1M sulphuric acid ,
0.1M sodium hydroxide soln. , magnesium ribbon .

Directions :
1. Measure 50 ml of the alkali in a Styrofoam cup . Record the temperature . 
Add 25 ml of the acid and record the highest temperature .
2. Measure out 50 ml of the sulphuric acid in a Styrofoam cup . Record the 
temperature . Weigh approx. 0.2g of the magnesium ribbon . Add to the acid and 
record the highest temperature .

Questions  :
Method 1
What was the number of moles of acid used ?
What was the number of moles of alkali used ?
What was the number of moles of water formed ?
What was the energy change ?
What was the value of the enthalpy of neutralization ?
( Heat of Neutralization is energy change when 1 mole of water is formed )

Method 2
What was the number of moles of acid used ?
What was the number of moles of magnesium used ?
Which reagent is limiting ?
What was the energy change ?
What was the value of the enthalpy of reaction ?

Why was a Styrofoam cup used ?
What errors were there ?

Criteria : ANALYSIS & INTERPRETATION

Discussion		4 mks
Sources of error	2 mks
Calculations	4 mks