On 3 - Hydrogen reacts with chlorine as shown below H2(8)
+
Cl2(g) → HClig)
AH = -184 kj
calculate the energy change when 14.2g of chlorine reacts completely with hydrogen

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.

Decomposition is the cycle at which bacteria breaks down any organic material into the soil

Ithink is a because if say increased in electronegativity