QUESTION 11 At 20°C, the vapour pressures of pure benzene, CeHs and toluene, CsHsCH3 are 30.0 mmHg and 93.0 mmHg, respectively. Determine the total vapour pressure above solution containing 23.0 g of CeHe and 20.0 g of CeHsCH3 at 20°C. The molar masses of CeHe and CoHsCH3 are 78.0 and 90.0 g mol", respectively.
QUESTION 11 At 20°C, the vapour pressures of pure benzene, CeHs and toluene, CsHsCH3 are 30.0 mmHg and 93.0 mmHg, respectively. Determine the total vapour pressure above solution containing 23.0 g of CeHe and 20.0 g of CeHsCH3 at 20°C. The molar masses of CeHe and CoHsCH3 are 78.0 and 90.0 g mol", respectively.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter11: Properties Of Solutions
Section: Chapter Questions
Problem 70E: The vapor pressures of several solutions of water-propanol (CH3CH2CH2OH) were determined at various...
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Question 11 & Question 12
Transcribed Image Text:QUESTION 11
At 20°C, the vapour pressures of pure benzene, CeHs and toluene, CeHsCH3 are 30.0 mmHg
and 93.0 mmHg, respectively. Determine the total vapour pressure above solution
containing 23.0 g of CeHe and 20.0 g of CeHsCH3 at 20°C. The molar masses of CeHs and
CoHsCH3 are 78.0 and 90.0 g mol-', respectively.
Transcribed Image Text:QUESTION 12
Complete combustion of 2.3 g liquid ethanol, C2H5OH in a calorimeter raised the
temperature of 3000 mL of water by 10°C. The specific heat capacity of water is
4.18 Jg-1°C-1, and the density of water is 1.0 g mL-1.
a) Calculate the heat of combustion, AH of C2HSOH in kJ mol-'.
b) Write the thermochemical equation for the combustion of liquid C2HSOH.
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