Week 1 - Recap Quiz
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Last updated over 4 years ago
19 questions
1
In an exothermic reaction .....
In an exothermic reaction .....
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In an endothermic reaction ......
In an endothermic reaction ......
1
When an exothemric reaction take place, the raction mixture gives out heat because ...
When an exothemric reaction take place, the raction mixture gives out heat because ...
1
Which of the following recation is exothermic ?
Which of the following recation is exothermic ?
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Energy change in a chemical reaction is represented by the symbol...
Energy change in a chemical reaction is represented by the symbol...
1
ΔH is positive for what type of reactions?
ΔH is positive for what type of reactions?
1
Energy changes in chemical reactions are measured in...
Energy changes in chemical reactions are measured in...
1
Bond making is an
Bond making is an
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If a reaction is endothermic overall, what does this tell us about the bonds broken and made during the reaction?
If a reaction is endothermic overall, what does this tell us about the bonds broken and made during the reaction?
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On an energy level diagram (reaction profile), the products of an exothermic reaction will be ...
On an energy level diagram (reaction profile), the products of an exothermic reaction will be ...
1
ΔH is the energy change for the reaction. To calculate this...
ΔH is the energy change for the reaction. To calculate this...
1
Thermal decomposition is...
Thermal decomposition is...
1
Pick the correct combination for the correct information regarding bond energies.
Pick the correct combination for the correct information regarding bond energies.
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The overall energy change in a chemcial reaction is -24kJ/mol. What does this tell us about the reaction?
The overall energy change in a chemcial reaction is -24kJ/mol. What does this tell us about the reaction?
1
The reaction profile for the course of a chemical reaction. Which of the following statements is TRUE?
1
When hydrogen fluoride is heated it breaks down into hydrogen and fluorine.
The equation can be written as: 2HF(g) ==> H2(g) + F2(g)
Use the bond energies shown below to calculate the energy change that takes place when 2 moles of hydrogen fluoride thermally decomposes in this way.
(Bond energies in kJ/mol: H-H = 440; F-F = 155; H-F = 560)
When hydrogen fluoride is heated it breaks down into hydrogen and fluorine.
The equation can be written as: 2HF(g) ==> H2(g) + F2(g)
Use the bond energies shown below to calculate the energy change that takes place when 2 moles of hydrogen fluoride thermally decomposes in this way.
(Bond energies in kJ/mol: H-H = 440; F-F = 155; H-F = 560)
1
The reaction between hydrogen and chlorine to form hydrogen chloride can be written as:
H2(g) + Cl2(g) ===> 2HCl(g)
Use the bond energies shown to calculate the energy change that takes place when hydrogen chloride is formed according to the above equation.
(Bond energies in kJ/mol: H-H 435, Cl-Cl 245, H-Cl 430)
The reaction between hydrogen and chlorine to form hydrogen chloride can be written as:
H2(g) + Cl2(g) ===> 2HCl(g)
Use the bond energies shown to calculate the energy change that takes place when hydrogen chloride is formed according to the above equation.
(Bond energies in kJ/mol: H-H 435, Cl-Cl 245, H-Cl 430)
1
What is activation energy?
What is activation energy?
1
What must we remember to do with the ratio of moles in a reaction?
What must we remember to do with the ratio of moles in a reaction?