Chemistry Help Now!?

Question

What term refers to the condition in which the concentration of the reactants and products remains constant over time?

forward reaction

reverse reaction

chemical equilibrium

rate

What is meant by a reversible reaction?

Under what conditions can the equilibrium point change?

which is higher, the energy of the reactants or the energy of the products? (like how do you know)

energy of reactants

energy of products

Equilibrium happens through spontaneous processes without any outside forces acting on the system.
True
False

Match the definition

enthalpy A) measure of the heat content of a chemical or physical system
activation energy B) the minimum energy needed to start a chemical reaction
entropy C) a physical or chemical change that occurs with no outside intervention
concentration D) measure of the relative proportion of two or more quantities in a mixture
spontaneous process E) quantity specifying the amount of disorder or randomness in a system bearing energy

Answer 1

concentration of reactants and products constant over time = chemical equilibrium

A reversible reaction is a reaction where the when you mix the reactants together you get the products (forward reaction) and also if you were to mix the products together you would get the reactants (reverse reaction).

eg. H2CO3(aq) -> H+(aq) + HCO3-(aq)

Also: H+(aq) + HCO3-(aq) -> H2CO3(aq)

This reaction goes forwards and backwards and is reversible. H2CO3(aq) <=> H+(aq) + HCO3-(aq)



The equilibrium point changes if you were to change the concentration of one of the reagents. If you were to put more H+ in then you would find the equilibrium driven towards formation of more H2CO3




Energy of the reactants is generally greater than the energy of the products, if I recall correctly. This drives the forward reaction.