A vapor volume of 1.17 L forms when a sample of liquid acetonitrile, CH3CN, absorbs 1.00 kJ of heat at its normal boiling point (81.6 °C and 1 atm). What is Hvap in kilojoules per mole of CH3CN?​

Answers

Answer 1

The heat of vaporization of CH3CN is obtained from the question as 25 KJ/mol.

We can obtain the number of moles from;

PV = nRT

P = 1 atm

V = 1.17 L

n = ?

R = 0.082 atm LK-1mol-1

T = 81.6 °C + 273 = 354.6 K

n = PV/RT

Substituting values;

n =  1 atm × 1.17 L/0.082 atm LK-1mol-1 × 354.6 K

n = 0.04 moles

Using; q = n·ΔHv

q = Heat absorbed

n = number of moles

Hv  = Heat of vaporization

ΔHv = q/n

ΔHv = 1.00 × 10^3/0.04

ΔHv = 25 KJ/mol

Learn more: https://brainly.com/question/2510654


Related Questions

What is the mass of 0.5 moles of hydrogen gas

Answers

Answer:

1G

Explanation:

The city council of a small town wanted to add fluoride to their water so that all the residents would have healthier teeth. The mayor had read that ionic compounds must be used to get the fluoride into water. He looked up fluorine-containing compounds and came up with the following list. ​
NaF NF3 SiF4 CaF2 NH4F​

Using academic vocabulary in paragraph form, discuss the following: ​

Explain which compound(s) could produce fluoride ions in the water. In your response, be sure to include: ​
° which of the listed compounds are ionic and which are covalent. ​
° how ionic and covalent compounds are different. ​
° why only ionic compounds would produce fluoride in water.​

Answers

Answer:NaF is ionic. NF3 is covalent. SiF4 is ionic. CaF2 is Ionic and  NH4F is also ionic. Ionic compounds transfer electrons whereas covalent compounds share electrons hence the word "co". Also, ionic compounds are formed with metal and nonmetal. Where a covalent is with 2 nonmetals. Only ionic compounds would produce fluoride in water because ionic compounds can dissolve in water and covalent compounds cant.

The compounds that can be used for the release of fluorine in water are NaF, [tex]\rm SiF_4[/tex], [tex]\rm CaF_2[/tex], and [tex]\rm NH_4F[/tex].

The ionic compounds are formed by the transfer of electrons between the atoms of the compounds. The ionic bonds are weaker and are easy to dissociate in the aqueous solution.

The covalent compounds are formed by the sharing of electrons between the atoms. Since there is sharing, there has been a strong bond, that has been hard to dissociate.

The Mayor has to release Fluoride in the water, thus ionic compounds are preferred that have the easy release of fluorine.

From the given compounds:

NaF = Ionic compound[tex]\rm NF_3[/tex] = Covalent compound[tex]\rm SiF_4[/tex] = Ionic compound[tex]\rm CaF_2[/tex] =  Ionic compound[tex]\rm NH_4F[/tex] =  Ionic compound

Thus the compounds that can be used for the release of fluorine in water are NaF, [tex]\rm SiF_4[/tex], [tex]\rm CaF_2[/tex], and [tex]\rm NH_4F[/tex].

For more information about ionic and covalent compounds, refer to the link:

https://brainly.com/question/10748806

how do you separate the following mixture? Name only the process involved .
1.Sand and salt ​

Answers

Answer:

Just dissolve in water , you can separate

Explanation:

because salt dissolves in water but sand doesn't

Explanation:

sedinentation and decantation

Your private gas collection consists of the four following gases, with each gas in a separate container, and exactly 1.0 g of each gas: CO2(g). Ne (g), Cl2
(g), and H2S (g). Which of your prized gases occupies the smallest volume at standard temperature and pressure (STP)?
H2S (g)
CO2 (g)
Cl2 (g)
Ne (g)

Answers

Answer:Cl2

Explanation:each gas is 1 gm and has the same P andT. The gas with the highest molar mass will have the lowest volume with least moles. Cl2 wins the prize

U ever get an answer

Answers

yesn’t. they are either wrong or links
Other Questions
what is the link between Shah Walk Allah and the Pakistan movement C'est un homme. Cet homme s'appelle Jack Black.Il est acteur et comdien. CAN SOMEONE HELP ME ASAP I HAVE 5 MINSILL GIVE BRAINLYNO BOTS OR YOU WILL BE REPORTED Each team tries to score more points.....win the Each team tries to score more points...to win the match. (in spite of/in order to/so that) c.The family purchased refreshments and spent a total of $18.50. If the total amount of money spenton tickets and refreshments was $94.50, use an equation to find the cost of one regular admissionticket.How would you write the equation? Complete the equation to calculate the cost of the portable speaker, including sales tax.$53= % of $50 Which is equivalent to 43will mark brainlist if right 2- The Dragon in Asian culture can be a symbol of:A- love and tranquilityB- Wisdom and enlightenment 170 students or 85% of the students went to attend college what are the total number of students? what is the simplest from of the ratio 40:16 ? Why did a revolution occur in Russia -0.75___-3/4which one is greater What is the coefficient of the first term in this expression?4r+q3r2+8q2r breathing involves the movement of diaphragm and Rib cagetrue or false What different cultures celebrate thanksgiving differently? Who names the Max/Kevin duo as "Freak the Mighty"Question 8 options:MaxThe policeKevinGram Name examples of primary sources and secondary sources. if you help me you get brainly need help w this question Solve the math problem Only solve 3 and 4