Question

Homework week 6 1. How do gaseous, liquid, and solid methanol (CHO) compare in each of the following features: (a) density; (b) the space between the molecules; (c) the attractive force between the molecules? 2. Convert each pressure unit to the indicated unit. a. 3.0 atm to mm Hg b. 720 mm Hg to psi c. 424 mm Hg to atm 3. A sample of nitrogen gas has a volume of 15.0 mL at a pressure of 0.50 atm. What is the pressure exerted by the gas (in atm) if the volume is changed to each of the following values? a. 30.0 ml b. 5.0 ml 4. A volume of 0.50 L of air at 37 °C is expelled from the lungs into cold surroundings at 0.0 *C. What volume (in L) does the expelled air occupy at this temperature? 5. A pressure cooker is used to cook food in a closed pot. By heating the contents of a pressure cooker at constant volume, the pressure increases. If the steam inside the

Answer 1

Solids, Liquids & Gases are the three states of matter . Solids have the strongest intermolecular forces of attraction and Gaseous have weakest intermolecular forces of attractions.

Solids have a close packing of molecules so they have least inter molecular space between the molecules while packing in case of gases is very poor and their is maximum intermolecular space .

Density is defined as mass per unit volume . It depends on the packing of molecules . Solids have closed packing so they have maximum density while gaseous have very low density.

For detailed solution please refer to images as attached.

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Page 6 Question ③ According to Boyle's laque Pi Vi =PgVq P = Initial Pressure= 0.50 att Vi= Initial Volume= 15.0mL P2 = final pressure=? Vq = final Volume= 30.0mL So o- so ath x 15.00 V₂ 30.0m come Pa = 0.125 = 1.25 xlorlatm. Pa = Pivi pressusze Exeertech by Gas (В. Vg = 500mL Pi= = 0.50 ath Pq=? Vi= Initial Volume=15.0mL Pressure exerted the Gas (ath) So final by ☆ P2 = Pivo Va 0.50 ath x 15.06 5.0 = 1.5 atm.