Transcript
1 Heat of precipitation, ∆H
Set up of apparatus
Initial temperature of AgNO3 28.0Initial temperature of NaCl 27.0Highest temperature 31.5
1. Chemical equation2. Ionic equation
3. No. moles, x =mv/1000
No mole, Ag+ = No mole, Cl- =
4. Heat changes,H =mc∆Ө
5. ∆H= H/x
6. Energy level diagram
2 Heat of displacement,, ∆H
Set up of apparatus
Initial temperature of CuSO4 , oC 28.0Highest temperature, oC
1. Chemical equation2. Ionic equation
3. No. moles, x =mv/10004. Heat changes,H =mc∆Ө
5. ∆H= H/x ∆H = -199.5 kJ mol-1
6. Energy level diagram
25cm3 CuSO4 0.2 mol dm-3
0.5 g zinc
3 Heat of neutralisation, ∆H
Set up of apparatus
1. Chemical equation2. Ionic equation3. No. moles, x =mv/1000
No mole, H+ = No mole, OH- =
4. Heat changes,H =mc∆Ө
5. ∆H= H/x
6. Energy level diagram
4 Heat of combustion, ∆H
Set up of apparatus
Mass of spirit lamp + ethanol before
26.33g
Mass of spirit lamp + ethanol after
25.50g
Initial temperature 29.0 oCFinal temperature 59.0 oC
1. Chemical equation2. Ionic equation3. No. moles, x =mv/1000
4. Heat changes,H =mc∆Ө
5. ∆H= H/x
6. Energy level diagram
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