Use the following information to answer questions:

The reaction of gaseous carbon dioxide and steam results in the formation of oxygen gas and acetylene gas. A balanced equation for this reaction is shown below:

CO2(g) + 2H2O(g) → 2C2H2(g) + 5O2(g)

ΔH values are provided for a series of related reactions:
C2H2(g) + 2H2(g) → C2H6(g) ∆H = –94.5 kJ
H2O(g) → H2(g) + 1/2O2(g) ∆H = –71.2 kJ
C2H6(g) + 7/2O2(g) → 2CO2(g) + 3H2O(g) ∆H = –283 kJ

MCAT Chemical and Physical Foundations of Biological Systems 12

Time left 00:00

5 Questions

1. When CO2(g) and H2O(g) react, the two gaseous products are collected in separate containers. If 5.00 g CO2 reacts with an excess of H2O, what volume of O2 will be produced at STP (standard temperature and pressure), given that the ideal gas constant, R, is equal to 

?

1.27 L2.55 L3.18 L0.373 L

2. When CO2(g) and H2O(g) react, the two gaseous products are collected in separate containers. If 5.00 g CO2 reacts with an excess of H2O, what volume of O2 will be produced at STP (standard temperature and pressure), given that the ideal gas constant, R, is equal to 

?

0.373 L2.55 L3.18 L1.27 L

3. The VSEPR shape of CO2(g) is

T-shaped.tetrahedral.bent.linear.

4. The value of ΔS for the reaction of CO2(g) and H2O(g) is

negative because a greater number of moles of CO2 than H2O are required for the reaction.positive because a greater number of moles of CO2 than H2O are required for the reaction.negative because the number of gas molecules increases over the course of the reaction.positive because the number of gas molecules increases over the course of the reaction.

5. If 2.0 g each of CO2(g) and H2O(g) react completely, what mass of C2H2 will be produced?

1.2 g2.4 g2.9 g0.59 g