Heat of displacement (Find the change of temperature)

In an experiment, excess magnesium powder is added to 50 cm3 of 0.25 mol dm-3 
iron(ll) sulphate solution. The thermochemical equation is shown below,

       Mg(s)   +   Fe2+ (aq)  à  Mg2+ (aq)  +   Fe (s)                  ΔH =  -80.6 kJ mol - 1  

What is the change in temperature?
[ Specific heat capacity of solution : 4.2 J g-1 0C-1 . Density of solution : 1 g cm-3 ]

(ans: 4.8 oC)

No comments:

Post a Comment