What does the zeroth law of thermodynamics allow us to define?
2 answers:
Explanation:
Zeroth law of thermodynamics states that when two thermodynamic systems are in equilibrium with a third system then all of them are in thermal equilibrium with each other.
For example, system A is in thermal equilibrium with system B and system B is in thermal equilibrium with system C then it means system A is also in thermal equilibrium with system C.
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Answer:
The four resonance structures of the phenoxide ion are shown in the image attached
The conjugate base of cyclohexanol has only one resonance contributor, while
the conjugate base of phenol has four resonance contributors.
Explanation:
In organic chemistry, it is known that structures are more stable if they possess more resonance contributors. The greater the number of contributing canonical structures, the more stable the organic specie. Since the phenoxide ion has four contributing canonical structures, it is quite much more stable than cyclohexanol having only one contributing structure to its conjugate base. Hence the PKa(acid dissociation constant) of phenol is lesser than that of cyclohexanol. The conjugate base of phenol is stabilized by resonance.
