Askateboard is pushed up a hill with a 90 n force to the left and experiences a gravitational force of 100 n to the right. (a) will accelerate to the left (b) will accelerate to the right (c) will not accelerate

Since the 100 N to the right is greater than the 90 N, it will accelerate to the right.

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.