Question

Question 16 Incomplete answer Marked out of 11.00 P Flag question Acetone (C3HO) has a boiling point of 56.1°C and a melting point of -95°C. The specific heat of acetone is 1.653 J/g Kin the solid phase, 2.144 J/gK in the liquid phase, and 1.343 J/gK in the gas phase. Its heat of fusion is 5.70 kJ/mole while its heat of vaporization is 31.0 kJ/mol. Use this information to answer the questions below. Report numerical answers with the correct SF and units. Do NOT leave a space between the number and the unit. a. Calculate the amount of heat gained or lost when 125 g of liquid acetone is converted to a gas at 56.1°C. Include the correct sign, SF, and units. +107kJ b. How much heat is gained or lost when exactly one mole of acetone is frozen? Include the correct sign, SF, and units. c. What is the physical state of acetone at -125°C? d. How many kJ heat are needed to heat 35.2 g of acetone from-125°C to -98°C?

Answer 1

acetone (s, - 95°c) acetone (l,- 95°c) THE = 5.70 kJ moi- acetone (es, 95°c) hoz acetone (s, – 95°c) H = -5° 70 Kg.mot for a mol acetone: - Ans - T-5.70 kJ ② as the melting point of acetone is =- 95°c -125 C & the physical state of acetone is Isolid acetone (s, -12°c) — * Acetone (S, -28°C) q= mx Sp. heat & the = 3529 * 1653 J/g.k * (27k) = 157109 = 1.571KJ 1 acetone (1, 5616) acetone (g, 56.16) THv = 31.0 kJ.moi? 125 g acetone 125 - - - moi 58 = 2.155 mol A Hv = 310x 20155 KJ - 16681 kJl Scanned with CamScanner