Consider the following equation in chemical equilibrium.
c2h4(g) + h2(g) = c2h6(g) + 137 kj
what happens to the amount of ethane (c2h6) when the temperature of the system is increased?
a. the amount of ethane decreases.
b. the amount of ethane increases initially and then decreases.
c. the amount of ethane increases.
d. the amount of ethane decreases initially and then increases.

An uncovered pot of water lies out in the sun. which statements correctly describe what happens at the surface of the liquid water? 1. the vapor pressure remains constant regardless of the water temperature. 2. the vapor pressure is produced by water molecules that have evaporated. 3. the vapor pressure increases as the sun heats the water in the pot. 4. evaporation stops once the vapor pressure reaches a certain point. 5. evaporation and condensation both occur on the liquid’s surface.