What experimental evidence led Rutherford to conclude that, a) the nucleus of an atom contains most of the atomic orbitalb) the nucleus of an atom is positively chargedc) the atom consists of mostly empty space

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.

A) the enthralling of formation for pure element in its standard state is always positivehope this : )

Sorry i think the answer is b