#7 - 52 g of ice #8 - 331.9 K*** Please help with these chemistry problems.. Tha

Question

#7 - 52 g of ice #8 - 331.9 K***
Please help with these chemistry problems.. Thank you! Folder Activity Chapter 11 Number 1 Printed Name: 1. Which liquid 30 November 2015 Chm 203 Student number has the highest vapor pressure at any temperature? has the highest boiling point? .. has the strongest intermolecular forces? would evaporate the fastest in an open container? 2. Estimate the boiling point of water if the external pressure is 400 mmHg? 3. At what temperature at 1 atm one substance entirely a gas and the other two are still liquids? 4. Sketch a heating curve for water (see notes), Label the regions I, I,111 IV, and V like we did in dlass. Which value would you need for each region? (Values given are for water )-601 kumol SKETCH Region I A. AHfus = 601 kJhnol B. AHvap-40 67 kJmol C. Cm, H2O(s) = 36.7 Jhnol deg _ Region II _ Regon lll Region IV D. Cm, 200 75.4 Jmol deg -Region V E.Cm, H20(g) #33.6 Jmol deg 5. What regions from the picture in Question 4 (l, ll, lll, IVV) would you need to calculate the heat transferred 5. What regions from the picture i in Question 4 (, II, III, IV, V) would you need to calculate the heat transferred when H20 i... A. Raised in temperature from -10 °C to+50 °C B. Lowered in temperature from 90 °C to 50 °C C. Lowered in temperature from 10 °C to -30 °C D. Raised in temperature from-10 °C to +110 E. Raised in temperature from-10 °C to -5°c Circle the regions. I V Circle the regions:UR V Circle the regions: 1 111 , Circle the regions: 1 11 V Circle the regions:1 Ill rv v 6. Which of the above situations (in Question 5) is exothermic? A B C DE 7. How much heat is required to warm ice at -25 °C to water vapor at 120 °C? 8. Use the Clausius-Clapyron equation (page 419) to estimate AHvap for bromine, given that bromine has a vapor pressure of 400 mmHg at 41.0 °C and a normal biling point of 331.9 mmHg

Explanation / Answer

1.

Ether (red) has the highest vapour pressure..

Water (blue) has the highest boiling point (read on the line at 760 mmHg)

Water has the strongest intermolecuar forces (reason: highest boiling point)

Ether (red) will evaporate faster.

2. Read on blue plot at 400 mmHg:   82..83ºC

3. At t > 35 ºC , but below 78 ºC

4. I suppose it is a graph Temperature vs Heat received. During ice melting (t = 0 ºC) and water evaporation (t=100 ºC), the temperature is constant.

5.

A. III, I, IV

B. IV

C. IV,I,III

D. III, I, IV, II, V

E. III

6.

B, C

7. Calculated for 1 mol water:

36.7 J/mol. ºC x25 ºC + 6010 J/mol + 75.4 J/mol. ºC x 100 ºC + 40670 J/mol+ 33.6 J/mol. ºC x20 ºC = ……..J/mol

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