How much thermal energy (q) gained or released when 58.08 g of acetone condenses

Question

How much thermal energy (q) gained or released when 58.08 g of acetone condenses at its phase transition +29.1 kj -29.1 kj +31.0 kj -31.0 kj Using the phase diagram, which statement about the compound is correct? The compound represented is pure water. At 25.0 degree C and 6 atm the substance is a liquid. At 0 degree C, the gaseous form of the compound can be compressed to form a liquid. At standard temperature and pressure, the substance only exists as a solid. Which changes will increase the solubility of a gas in water? Decreasing temperature and decreasing pressure Decreasing temperature and increasing pressure increasing temperature and increasing pressure Increasing temperature and decreasing pressure A 2.0 L solution (d = 1.07 g/mL) is made by dissolving 135.72 g of KC1 in pure water. Calculate the mass percent of the solution? 7.16% 6.68% 6.34% 5.96% Which of the following soluble ionic compounds will lead to the highest osmotic pressure when equal concentration solutions of each are made at the same temperature? Assume complete dissociation of the solute into its component ions. Copper(II) Oxide NH_4NO_3 Gallium Chloride NiS

Explanation / Answer

(5.) D. -31.0kJ/mol

(6.) D. At STP, the substance exists only as solid.

(7.) B. Decreasing temperature and increasing pressure.

(8.) C. 6.34%

(9.) C. Gallium Chloride

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