Considering intermolecular forces in the pure substance, which of these substances exists as a gas at 25 °C and 1 atm?(a) CH3CH2CH2CH3 (butane)(b) CH3OH (methanol)(c) Ar

How many different types of intermolecular forces are there? Give 2 examples of each.

(a) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules begin to flow? (b) Consider a substance where the intermolecular forces hold the molecules in close contact with each other, but the molecules can flow. What is the process called when enough heat has been added to the substance so that the molecules escape each other? (c) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules can escape each other?

A 0.554 g sample of steam at 106.0 °C is condensed into a container with 5.20 g of water at 16.4 °C. What is the final temperature of the water mixture if no heat is lost? The specific heat of water is 4.18, the specific heat of steam is 2.01 g., and AH vap = 40.7 kJ/mol. T₁ = °C

A liquid at 15.0 °C exhibits a vapor pressure of 0.735 atm. When heated to 30.0 ° C, the vapor pressure is 0.950 atm. What is the heat of vaporization (in kJ mol–1 to two decimal places) of the liquid?

When 5.00 g of isopropyl alcohol ((CH3),CHOH; molar mass = point of 82.6°C, it absorbs 3.66 kJ of heat. What is the enthalpy of vaporization of isopropyl alcohol in kJ/mol? 60.09 g/mol) evaporates at its boiling

The metal calcium melts at a temperature of 839 °C and boils at 1484 °C, whereas the metal chromium melts at a temperature of 1857 °C and boils at 2672 °C. (a) Which metal will be more volatile at room temperature? (b) Predict which of the two molten metals has the larger surface tension at its melting point.

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