Chemistry homework questions please help

Posted on 2014-03-28 11:13:00 in Chemistry by UNKNOWN

2) At what pressure would hydrogen gas be most soluble in 100 grams of water at a temp of 25 c?

A) rate at which products are formed is greater than the rate at which reactants are formed.

B) rate at which products are formed is the same as the rate at which reactants are formed.

C) concentration of products is the same as the concentration of reactants

D) concentration of products is greater than the concentration of reactants



8) Given the reaction at equilibrium: Which stress on t he system at equilibrium will decrease the concentration of AB (g)?

A) increase the concentration of A2 (g)

B) increase the temperature

C) increase the pressure

D) decrease the pressure.

I know for sure it's not c.



19) Given the following equilibrium reaction at STP: H2 (g) + I2(g) + 53.0kJ = 2HI(g)

State two stresses that could be applied to this system that would cause this equilibrium to shift to right. Explain why each stress would cause a shift in the equilibrium.



22. Which statement correctly describes an exothermic chemical reaction?

A) The products have higher potential energy than the reactants and the delta H is negative.

b) the products have higher potential energy than the reactants and the delta H is positive.

C) The products have lower potential energy than the reactants, and the delta H is negative.

D) The products have lower potential energy than the reactants, and the delta H is positive.



Thanks for everyone that helps :)

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