Answer:
A pure substance in the gaseous state contains more energy than in the liquid state, which in turn contains more energy than in the solid state. Particles has the highest kinetic energy when they are in the gaseous state. Kinetic energy is related to heat (also called thermal energy).
Explanation:
Answer is: a.2h2(g) + o2(g) 2h2o(g) + 483.6 kj.
Conservation of mass (mass is never lost or gained in chemical reactions), during chemical reaction no particles are created or destroyed, the atoms are rearranged from the reactants to the products.
The law of conservation of energy states that the total energy of an isolated system remains constant; energy can neither be created nor destroyed; it can only be transformed or transferred from one form to another.
Balanced chemical reaction: 2H₂ + O₂ → 2H₂O ΔH = 483.6 kJ.
There are four hydrogen atoms and two oxygen atoms on both side of balanced chemical reaction.
