Name ________________
Table I Questions
Date:_________________
1. Which statement best describes a chemical reaction in which energy is released?
1) It is exothermic and has a negative H.
2) It is exothermic and has a positive H.
3) It is endothermic and has a negative H.
4) It is endothermic and has a positive H.
2. Which balanced equation represents an endothermic reaction?
1) C(s) + O 2(g) ® CO 2(g)
2) CH 4(g) + 2O2(g) ® CO 2(g) + 2H2O( )
3) N2(g) + 3H2(g) ® 2NH 3(g)
4) N2(g) + O 2(g) ® 2NO(g)
3. Given the reaction:
2 H2(g) + O 2(g)
2 H2O( ) + 571.6 kJ
What is the approximate H for the formation of 1 mole of H 2O( )?
1) –285.8 kJ
2) +285.8 kJ
3) –571.6 kJ
4) +571.6 kJ
4. Given the balanced equation:
4Fe(s) + 3O 2(g)
2Fe2O3(s) + 1640 kJ
Which phrase best describes this reaction?
1) endothermic with H = +1640 kJ
2) endothermic with H = –1640 kJ
3) exothermic with H = +1640 kJ
4) exothermic with H = –1640 kJ
5. Given the balanced equation:
Which statement best describes this process?
1) It is endothermic and entropy increases.
2) It is endothermic and entropy decreases.
3) It is exothermic and entropy increases.
4) It is exothermic and entropy decreases.
6. Which compound is formed from its elements by an exothermic reaction at 298 K and 101.3 kPa?
1) C2H4(g)
2) HI(g)
3) H 2O(g)
4) NO 2(g)
7. Which reaction releases the greatest amount of energy per 2 moles of product? (See Table I)
1) 2CO(g) + O 2(g)
2) 4Al(s) + 3O 2(g)
2CO 2(g)
2Al 2O 3(s)
3) 2H2(g) + O 2(g)
4) N2(g) + 3H 2(g)
2H2O(g)
2NH 3(g)
8. Which reaction releases the greatest amount of energy per 2 moles of product?
1) 2CO(g) + O 2(g) ® 2CO 2(g)
2) 4Al(s) + 3O 2(g) ® 2Al 2O 3(s)
3) 2H2(g) + O 2(g) ® 2H2O(g)
4) N2(g) + 3H 2(g) ® 2NH 3(g)
9. Given the reaction:
CH 4(g) + 2 O 2(g)
2 H2O(g) + CO 2(g)
What is the overall result when CH 4(g) burns according to this reaction?
1) Energy is absorbed and
2) Energy is absorbed and
H is negative.
H is positive.
3) Energy is released and H is negative.
4) Energy is released and H is positive.
10. According to Reference Table I, which statement best describes the formation of HI(g)?
1) It is exothermic, and heat is released.
2) It is exothermic, and heat is absorbed.
3) It is endothermic, and heat is released.
4) It is endothermic, and heat is absorbed.
Chemistry!
Answer Key
Table I
1.
1
2.
4
3.
1
4.
4
5.
1
6.
3
7.
2
8.
2
9.
3
10.
4
Chemistry!