What overall effect does adding a catalyst have on a chemical reaction? It increases pressure on the system. It increases reactant surface area. It lowers the activation energy that is needed. It lowers the concentration of reactants.

Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?