Which statement would indicate the presence of an acid?
2 answers:
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Answer:
positif
Explanation:
Answer: B. ΔH < 0, ΔS > 0, and ΔG < 0
Explanation:
Exothermic reactions are those in which heat is released by the system and endothermic reactions are those in which heat is absorbed by the system.
for Exothermic reaction is negative and
for Endothermic reaction is positive.
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
is positive when randomness increases and
is negative when randomness decreases.
When NaOH is dissolved into water, the molecules change their state from solid to aqueous and thus randomness increases. The beaker becomes warm means the reaction is exothermic
is positive and
is negative Using Gibbs Helmholtz equation:
Thus will be negative.
Thus is positive,
is negative and
will be negative.