Which reaction would cause an increase in entropy? a. so2cl2(g) so2(g) + cl2(g) b. pcl3(g) + cl2(g) pcl5(g) c. 2co(g) + o2(g) 2co2(g) d. c2h2(g) + h2(g) c2h4(g)

A)

Explanation: Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

A)

1 mole of gaseous reactant is converting to 2 gaseous products, thus the entropy increases.

B)

2 moles of gaseous reactants are converting to 1 gaseous products, thus the entropy decreases.

C)

3 moles of gaseous reactants are converting to 1 gaseous product, thus the entropy decreases.

D.

2 moles of gaseous reactants are converting to 1 gaseous product, thus the entropy decreases.

particle   p is an electron and particle q is a neutron