Physical chemistry: Tinoco, 5th ed. a. which of the following has the lowest sta
ID: 959492 • Letter: P
Question
Physical chemistry: Tinoco, 5th ed.
a. which of the following has the lowest standard chemical potential at 250C: CH4(s), CH4(l), CH4(g), or CH4(aq)? Explain your answer.
b. Calculate the solubility in mol L-1 for CH4 in water at 250C when the CH4 gas pressure is 1 bar.
c. will the solubility be greater or less at 00C? Explain your answer.
d. Henry's Law constant for nearly all of the gases listed in table 6.1 increase with increasing temperature. what can you conclude from this about an important thermodynamic property (for example, enthalpy, heat capacity, entropy, or free energy) associated with the dissolution of gases in water? check table 6.1 from tinoco physical chemistry 5th edition.
Explanation / Answer
(a): Chemcial potential decreases from solid to liquid to gas. Hence CH4(g) has the lowest chemical potential.
(b): Henry law cnstant form CH4 is required to answer this problem.
(c): The solubility of CH4 at 25 DegC is less than the solubility at 0 DegC, because the solubility decreases with increase in temperature.
(d): As CH4 comes from gaseous phase to aqueous phase, its entropy decreases.