A person walking covers 5.20 m in 10.4 s. How fast is the person moving?

0.50 m/s

Explanation:

Velocity = distance over time

where distance = 5.20 m

                   time = 10.4 s.

velocity =  5.20  m

                  10.4 s.

            = 0.50 m/s  

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.