A student collects data to determine the enthalpy of vaporization of water. Complete the following table for data collected at 61°C. Temperature   61°C     Temperature T    K   Report your answer to 2 decimal places Volume of Gas Bubble   7.0 mL     Volume V    L   Report your answer to 2 significant figures Height of the Water Column, h   54 mm     Mercury Equivalent of Water (MEW)     mm   Report your answer to 2 significant figures Barometric Pressure, Pbarometric   760.4 torr     Number of moles of air, nair   0.0002383 moles     R   62.364 L·torr/K·mol     Total Pressure of the Enclosed Gas Sample Ptotal    torr   Report your answer to 1 decimal place Partial Pressure of Air in the Gas Sample, Pair    torr   Report your answer to 1 decimal place Vapor Pressure of Water in the Gas Sample, Pwater    torr   Report your answer to 1 decimal place Natural log of the Vapor Pressure of Water in the Gas Sample, ln (Pwater)    torr   Report your answer to 2 decimal places Reciprocal of Temperature 1/T    K−1

LL The vapor pressure of Substance X is measured at several temperatures: temperature vapor pressure -27. °C 0.0449 atm -16. °C 0.112 atm -5.°C 0.257 atm Use this information to calculate the enthalpy of vaporization of X. Round your answer to 2 significant digits. Be sure your answer contains a correct unit symbol. Continue O 2022 McGraw Hill LLC. All Rights Re EPIC MacBook Pro ロ号 F3 F4 F5 F2 24 4. 23 7. 6. 3. 5. A G D. B. N 8

1 Intermolecular Forces Water is a polar molecule. It has an electric dipole strength of p = 6 x 10-30 C - m. This is roughly equivalent to a proton and an electron separated by a distance of d = 4 x 10-11 m (about the radius of a hydrogen atom). In this problem, we will use Coulomb's law to compare the force between two protons (H*), a proton and a water molecule, and two water molecules. Use the arrangement of the charges shown in the figure for your calculations. (a) r (b) (c) r (a) First, consider interactions at "short" distances. A chemical bond has a length on the order of r = 0.1 nm. • What is the force between two protons separated by a distance of r = 0.1 nm? • What is the force between a proton and a water molecule separated by a distance of r = 0.1 nm? What is the force between two water molecules separated by a distance of r = 0.1 nm? (b) Now consider a "long" distance: a separation of R = 1.0 nm. (This is about the length of ten hydrogen atoms lined up next to each…

2 You may want to reference Section 3.7 (Pages 80-87) while completing this problem. Using the values for the heat of fusion, specific heat of water, and/or heat of vaporization, calculate the amount of heat energy in each of the following. Keep in mind that the sign of the heat involved in the state change is ignored. W Alt Jill # 3 F3 E x X C $ F4 4 R 8 % V SD F G 5 2 F5 5 HH T Fó Q Search 6 Y H 6 F7 ▼ & L Part A 7 Calculate the joules released when 145 g of steam condenses at 100 °C and the liquid cools to 35.0 °C. Express your answer to three significant figures and include the appropriate units. ASUS Value FB U HA Submit Previous Answers Request Answer * 56 X Incorrect; Try Again; 4 attempts remaining 8 BN M FO I J K D I 9 v → J 1 FIO Alt O D L BINET O ON/OFF Ctrl 0 ? P 10 : F12 I { Prt Sc [ A + = I Review | Constants | Periodic Table Insert } ] 165 Delete Backspace 1 Enter 12:06 AM 2/2/2023 ☺. ▷ Home Shift t PgUp O PgDn End Fn