ar2018 1159~ 074/15?4/1/2011 0609 PM Print Calculator Periodic PrintCalculator P

Question

ar2018 1159~ 074/15?4/1/2011 0609 PM Print Calculator Periodic PrintCalculator Periodic Table uestion 23 of 23 General Chemistry 4th Edition University Science Books preserted by Sapling Leaming Using the following data, Compound | Melting point (C) | ?? s (kJnnol) | Boiling point (e) | ?-to (kJhnol) HF HC HBr HI 83.11 -114.3 -86.96 -50.91 4.577 1.991 2.406 2.871 19.54 -84.9 67.0 35.38 25.18 17.53 19.27 21.16 calculate AStus and ASap for HCI Number Number (K mol J/ (K mol &Ss; Determine the entropy change when 2.80 mol of HCIg) condenses at atmosphernic pressure. J/ K ?Previous gave Up & View Souten O check Answer Net t Exit pe here to search Prtscn Home End 8 5 6

Explanation / Answer

Melting point of HCl = -114.3 C = -114.3 + 273.15 K = 158.85 k

So, Entropy change for fusion = Enthalpy change / Melting point

= 1.991 KJ/mol / 158.85 K = 12.533 J/molK

Boiling point of HCl = -84.9 C = -84.9 + 273.15 K = 188.25 K

So, entropy change for vapourization = Enthalpy Change / Boiling point

= 17.53 KJ/mol / 188.25 K = 93.12 J/molK

Entropy Change in condensation = DelSvap * mole = 93.12 J/molK * 2.8 mol

= 260.736 J/k

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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