What pressure will be exerted by 22g of CO2 at a temperature of 18c and a volume of 2.75L

Ithink is d. physical property

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.

18

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium