11.12) of your text to determine the intermolecular forces between the molecules: methanol (HO-CH3), PF5 NF3 NH4Cl, benzene (C6H6). BLB 10th Ed. Explain how a barometer measures atmospheric pressure. Explain how an open end manometer measures the pressure of an enclosed gas. What conditions for a gas must be defined for Boyle”s law to be true? Under these conditions, how does the pressure of a gas relate to its volume? (Use both an equation and plot to show this.) Give an equation and plot that represents Charles”s law. Give an equation and plot that represents Avogadro”s law. What conditions represent STP? What is so special about 22.4 liters of gas at STP? Under what conditions does P1V1/T1 = P2V2/T2?