Complete the sentence. If it collects a lot of mass, a space object will become due to .
Select one:

1. spherical; electromagnetism

2. spherical; gravity

3. a rocky planet; gravity
or
4. a rocky planet; electromagnetism

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.