Entropy is the measure of the number of energetically equivalent states availabl

Question

Entropy is the measure of the number of energetically equivalent states available to the components of a system. As the temperature of a system increases, the entropy also increases. Select the image to explore the activity that will help you to understand how an increase in temperature affects the physical state, molecular motion, and entropy of a substance 250 200 150 100 50 T=0K OCH,CI 0 50 100 150 200 250 300 Run Reset Temperature, K In the activity, you should see a box on the left side with molecular diagrams for the solid, liquid, and gaseous states of a compound. A graph of standard molar entropy versus temperature is displayed to the right of the molecular diagram box. You can select one substance from those listed in the lower left of the activity and run the activity for that substance. You can then reset the activity and select a different substance

Explanation / Answer

Entropy effect of H2

Entropy increases

H2(s) --> H2(l)

H2(l) ---> H2(g)

H2(s) --> H2(g)

Entropy decreases

H2(g) --> H2(l)

H2(l) ---> H2(s)

H2(g) --> H2(s)

For CH3Cl

Tm = 175.8 K

dS = 116 - 79 = 37 J/K.mol

So,

dHfus = TdS = 175.8 K x 0.037 kJ/K.mol = 6.504 kJ/mol

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.