4. The vapor pressure of ethanol is 100 torr at 34.9 °C. What is the vapo deltaH

Question

4. The vapor pressure of ethanol is 100 torr at 34.9 °C. What is the vapo deltaH..= 39.3 kJ/mol anol is 100 torr at 34,9 °C. What is the vapor pressure at 59.6°C? | a. 256.4 b. 153.8 torr C. 402.6 torr d. 312.47 torr 5. Determine i if the freezing point depression is .255°C of a 100m Mgso.. k=186 °C/m a. 1.19 1.86 E. 1.37 d. 2.04 6. What mass of Na, PO, needs to be added to 155g water to get a boiling point of 104,3°C. Kb= 0.51 °C/m a. 2.149kg b. 2149kg c. 3.56kg d. 356g 7. Which of the following reaction has an increase in entropy. 2KCIO. (s) 2KCIO, (s) + O(g) b. N(g) + 20(g) N:0.(9) C. 2CO(g) 2C(s) + 0,(9) Jd. CO(g) + MgO(s) MgCO,(s)

Explanation / Answer

4)
T1 = 34.9 oC
=(34.9 + 273)K
= 307.9 K
T2 = 59.6 oC
=(59.6 + 273)K
= 332.6 K
P1 = 1*10^2 torr
H = 39.3 KJ/mol
= 39300.0 J/mol

use:
ln(P2/P1) = (H/R)*(1/T1 - 1/T2)
ln(P2/1*10^2) = (39300.0/8.314)*(1/307.9 - 1/332.6)
ln(P2/1*10^2) = 4727*(2.412*10^-4)
P2 = 312.7 torr
Answer: d

Only 1 question at a time please

Related Questions

Navigate

• Browse (All)
• Browse 4
• Subjects

---

---

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