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izzyisawesome5232
21.11.2019 •
Chemistry
Which of the following processes have a δs > 0? which of the following processes have a > 0? 2hcl(g) → h2(g) + cl2(l) cesium chloride dissolves in pure water lithium fluoride forms from its elements 2nh3(g) + co2(g) → nh2conh2(aq) + h2o(l) all of the above processes have a δs > 0.
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Ответ:
b) cesium chloride dissolves in pure water
Explanation:
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.
a)![2HCl(g)\rightarrow H_2(g)+Cl_2(l)](/tpl/images/0383/9417/61c3f.png)
As one mole of the gas is converted to liquid, the randomness of particles decreases and hence
is negative and
.
b) cesium chloride dissolves in pure water:
As solid is converted to aqueous state and ions are formed, the randomness of particles increases and hence
is positive and ![\Delta S0](/tpl/images/0383/9417/cdf8d.png)
c) lithium fluoride forms from its elements :
As molecules combine to form a single product, the randomness of particles decreases and hence
is negative and ![\Delta S](/tpl/images/0383/9417/e57f4.png)
d)![2NH_3(g)+CO_2(g)\rightarrow NH_2CONH_2(aq)+H_2O(l)](/tpl/images/0383/9417/22f3f.png)
As gas is converted to liquid, the randomness of particles decreases and hence
is negative and ![\Delta S](/tpl/images/0383/9417/e57f4.png)
Ответ: