EASY
Upper Secondary: IGCSE
IMPORTANT
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What unit is measured to measure energy changes?

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Important Questions on Energy Changes, and Reversible Reactions

EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 3

2Na (s) + Cl2 (g) → 2NaCl (s)

The energy change for this reaction is -822 .4 kJ.

What can you conclude about it? 

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 4
Draw an energy level diagram for: an endothermic reaction.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 4
Draw an energy level diagram for: an exothermic reaction.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 1
Two steps must takes place, to go from reactants to products. What are they?
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 2
Some reactions are endothermic. Explain why using the ideas of bond making and bond breaking.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 3
Hydrogen reacts with oxygen. Draw the equation for the reaction, with lines to show the bonds.
HARD
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 4
Now see if you can calculate the energy change for the reaction between hydrogen and oxygen, given the bond energy
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 9 - Energy Changes, and Reversible Reactions>Q>Q 1
A sketch an energy level diagram that you think show a good fuel.