Da ? ×/.ona IOir. × ? 38% [+) Sun Apr 1 92714P, xD] Cengage .com/irn/takeAssignm

Question

Da ? ×/.ona IOir. × ? 38% [+) Sun Apr 1 92714P, xD] Cengage .com/irn/takeAssignment/takeCovalentActivity.do locator-assignment-take x *Settings x? cengage Use the References to aceess impertant values if needed fer this questien The following information is given for antimony at latm: boiling point 1440 °C melting point 631 °C specific heat solid-0.209 J/g C specific heat liquid- 0.259 J/g C ?? Lvap( 1440 °C)-195 kJ/mol dHfus(631°C)-19.6 klinol J for the process of freezing a 32.9 g sample of liquid antimony at its normal melting point of 631 C kJ Retry Entire Group 9 more group attempts remaining Submit Answer PreviousN O F4 0

Explanation / Answer

Molar mass of Sb = 121.8 g/mol

mass(Sb)= 32.9 g

use:

number of mol of Sb,

n = mass of Sb/molar mass of Sb

=(32.9 g)/(121.8 g/mol)

= 0.2701 mol

for freezing, heat is released

Q = delta H * number of mol

= -19.6 KJ/mol * 0.2701 mol

= -5.29 KJ

Answer: -5.29 KJ

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

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