We can determine the heat of vaporization by using the Clausius–Clapeyron equation if we know the vapor pressures of a substance at two different temperatures. Determine the heat of vaporization of diethyl ether if the vapor pressure is 1.0 mm Hg at –74.3 °C and 425 mm Hg at 18.7 °C.
Solved
Show answers
More tips
- G Goods and services Should You Engrave Your Wedding Rings? Facts, Myths, and Considerations...
- L Leisure and Entertainment How to Land on the Moon: Your Comprehensive Guide...
- T Travel and tourism How to Use a Compass: A Beginner s Guide...
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
- C Computers and Internet Отправляем смс через интернет: легко и просто...
- L Leisure and Entertainment The Best Film of 2010: A Look Back at the Academy Awards...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
Answers on questions: Chemistry
- C Chemistry Ethanol (density = 0.789 g/ml) combusts and produces 34.8 g h2o. what was the original volume of the ethanol?...
- C Chemistry Propose a plausible mechanism for the reaction f2 + 2clo2 → 2fclo2 given that the rate law for the reaction is rate = k[f2][clo2]. click in the answer box to activate the...
- C Chemistry Physical properties are the characteristics of matter that can be seen or measured through direct observation. True False...
- C Chemistry A given mass of an ideal gas occupies a volume V at a temperature T and under pressure P. If the pressure is increased to 2P and the temperature is reduced to 1/2T what is...
- C Chemistry In your own words Describe the Law of Conservation of Mass and what it has to do with balancing chemical equations. USE YOUR OWN WORDS...
- E English How does the author support their claim and purpose with word choice? by using imagery that appeals to the sense of sound....
- M Mathematics The world population is about 7 billion. There are 4.6 x 107 ants for every human on the planet About how many ants are there in the world? first write 7 billion in scientific...
- S SAT Scrap tire management is primarily regulated at the...
- L Law What does nelson mandela mean when he says overcoming poverty is not a gesture of charity...
- M Mathematics Rashad is having a picnic for 62 guests. He plans to serve each guest at least one hamburger. If each package, p, contains eight hamburgers, write the inequality that could...
Ответ:
-9.2 × 10⁴ J/mol
Explanation:
Step 1: Convert the temperatures to Kelvin
We will use the following expression.
K = °C + 273.15
T₁: K = 74.3°C + 273.15 = 347.5 K
T₂: K = 18.7°C + 273.15 = 291.9 K
Step 2: Convert the pressures to Pascal (SI unit)
We will use the conversion factor 760 mmHg = 101325 Pa.
P₁: 1.0 mmHg × 101325 Pa/760 mmHg = 1.3 × 10² Pa
P₂: 425 mmHg × 101325 Pa/760 mmHg = 5.67 × 10⁴ Pa
Step 3: Determine the heat of vaporization of diethyl ether
We will use Clausius–Clapeyron equation.
ln (P₂/P₁) = -ΔHvap/R × (1/T₂ - 1/T₁)
ln (5.67 × 10⁴ Pa/1.3 × 10² Pa) = -ΔHvap/(8.314 J/mol.K) × (1/291.9 K - 1/347.5 K)
ΔHvap = -9.2 × 10⁴ J/mol
Ответ: