What is the heat of fusion of chromium (in kJ/mol) if 10.0 of solid chromium abs

Question

What is the heat of fusion of chromium (in kJ/mol) if 10.0 of solid chromium absorb 2.82 times 10 J of heat in melting at 2173 K, its melting point? 1.34 6.86 48.5 14.7 34.3 For which of the following would hydrogen bonding nut be an important factor in determining physical properties in the liquid state? HBr H_2O HF NH_1 H_2O_2 Which liquid would evaporate most quickly at room temperature? H_2O, 18 g/mol Gasoline, C_8H_18, 114 g/mol Vegetable oil, 895 g/mol Mineral oil C_12 H 170 g/mol Ethylene glycol, HO-CH_2 - CH_2 - OH, 62 g/mol

Explanation / Answer

(1) (d)

It is given that,

heat absorbed by 10 g. of Cr = 2.82 * 103 J

Then heat of absorbed by 52 g. (1 mol) of Cr = 52 * 2.82 * 103 / 10 = 14.7 kJ

(2) (a) HBr, it cannot form hydrogen bonding.

(3) (b) Gasoline, due to weak vaderwaal forces among the molecules.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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