Which of the following indicates that a chemical reaction system has reached equilibrium? a)the temperature of the system is increasing.

b)the concentration of reactants is decreasing.

c)the temperature of the system is decreasing.

d)the concentration of products is constant

the volume of the system is changing.

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)