The normal boiling point of ethanol, CH_3CH_2OH, is 78.3degreeC and its molar he

Question

The normal boiling point of ethanol, CH_3CH_2OH, is 78.3degreeC and its molar heat of vaporization (deltaH_vap) is 39.3 kJ/mol. What would be the vapor pressure, in Ton-, of ethanol at 32.0egreeC?. Carbon disulfide, CS_2, has a vapor pressure of 100 mmHg at -5.1 degreeC and a normal boiling point of 46.5 degreeC. What is the molar enthalpy of vaporization (deltaH_vap) for carbon disulfide in kJ/mol? What is the vapor pressure of carbon disulfide (in mm Hg) at 20.0 degreeC? Water (H_2O) has a molar enthalpy of vaporization (deltaH_vap) of 40.7 kJ/mol; and its normal boiling point is 100.0 degreeC. What temperature (degreeC) does water boil in a pressure cooker when the internal pressure of the cooker is 1.90 atm?

Explanation / Answer

3)

ln(P2/P1) = H/R*(1/T1 - 1/T2)

T1 = 78.3+273 = 351.3

T2 = 32+273 = 305

ln(P2/760) = (39300/8.314)*(1/351.3 - 1/305)

solve for P2

P2/760 = exp(-2.042610)

P2 = 760*exp(-2.042610) = 98.5642 torr

NOTE:

Please consider posting all other questions in another set of Q&A. We are a not allowed to answer to multilpe questions in a single set of Q&A

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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