1. which type of chemical reaction results in the absorption of energy?

a.exothermic
b.combustion
c.replacement
d.endothermic

2. which type of chemical reaction occurs when natural gas is burned?
1. replacement
2. endothermic
3. decomposition
4. exothermic

3. which part of an energy graph is represented by the highest point?
1. the products of the reaction
2. the activated state
3. the amount of energy absorbed
4. the amount of energy released

4. during photosynthesis, carbon dioxide, water, and energy reacts to form glucose and oxygen. Which line would be Longer on the energy grab for photosynthesis?

A.the vertical line indicating bonds breaking
B.the horizontal line indicating products
C.the horizontal line indicating the activated complex
D. the vertical line indicating bonds forming

5. The dissolution of calcium chloride water is given by the following:
CaCl2(s)+ 2H2O> Ca(OH)2(aq)+2HCl(g)+heat
how would an energy graph of this reaction appears?
a. The reactants would appear at a lower energy state than the products?
b. The reactants and products would appear at a higher energy state.
c. The reactants and products were approved at a low energy state.
d. The reactants would appear at a higher energy state than the products

14 answers

1.endothermic
2.exothermic
3.the activated state
4.the vertical line indicating bonds breaking
5. The reactants would appear at a higher energy state than the products.

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