Answer:
II. The reaction is exothermic.
III. The enthalpy term would be different if the water formed was gaseous.
Explanation:
For the reaction:
C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)
The ΔH is -1.37×10³ kJ. As the change in enthalpy is <0,<em> II. The reaction is exothermic.</em>
The ΔH formation of a compound is different if the chemical is in liquid or gaseous phase. For that reason: <em>III. The enthalpy term would be different if the water formed was gaseous.</em>
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When liquid state is being converted to solid state, atoms come closer to each other and their speed of movement also decreases. Instead of moving about in the substance, they are only able to vibrate about their positions in solid. Hence, this change leads to loss of energy. Similarly, atoms loose energy when state changes from gas to liquid.
The chemical formula which shows the number of atoms for every element present in the molecule is said to be molecular formula.
Acetaldehyde is an organic compound having 
functional group. It is also called as ethanal.
Now, ethanal consist of one carbon atom which is linked with three hydrogen atoms and it is linked with one functional group i.e. aldehyde.
Thus, molecular formula of acetaldehyde is 
.
The factors are
<span>temperature of the land
</span><span>ripening of oranges
</span><span>evaporation of water
humidity of the surrounding air
Only one is a chemical property which is
</span>ripening of oranges
The rest are physical properties or changes. So, the answer is
A. 1<span />
