D. METALS + ACIDS: Activation Energies

See also students reported values for activation energies at Activation energy: what answer did you get?
 
A. Measurements
1. Why slower reaction at higher temperatures?!
2. Irreproducible results at different temperatures
3. Effect of metal on activation energy?
4. Effect of stirring on activation energy?
5. Slower reaction at higher temperatures
6. Method to find activation energies?
 
B.Arrhenius plots
1. How to use gas volume vs time data?
2. How to treat Arrhenius plot if a curve?
3. How to 'spread out' Arrhenius plots?
4. Error bars on Arrhenius plot?
5. Errors on activation energies
6. (a)How to deal with % error?
(b) Working out % error?
7. Activation energy too small - units?
8. Activation energy - value too small?
9. Activation energy - strong vs weak acid
10.Arrhenius plot: anomalous result at low temperature
 
C. Different acids
1. Should activation energies be similar for two strong acids?
2. Monobasic vs dibasic acids - which has higher activation energy?
3. Why does strength of acid affect activation energy?
4. Strong vs weak acids?
5. Unexpected difference between strong and weak acids
6. Value for HCl should be lower than ethanoic acid?
7. Expected values for di- & tri-protic acids?
8. Why is H₂SO₄ slower than HCl?
9. Mg + HCl value too low?
10. A very low value for activation energy?
11. Literature values for strong and weak acids?
12.Activation energy - strong vs weak acid
13.Meaning of E_a values for three acids?
 

 

 

updated: 11 April 2009