We may determine the corresponding equilibrium constant by evaporating acetic acid in a container that is...

We may determine the corresponding equilibrium constant by evaporating acetic acid in a container that is subsequently sealed and weighed. In one experiment, acetic acid was evaporated in a container of volume 21.45 cm3 at 437 K. The pressure of the vapor was 101.9 kPa. The mass of acid in the sealed container was 0.0519 g. The experiment was repeated with the same container (same volume and pressure) at a temperature of 471 K; the mass of acid in the second container was 0.0380 g.

Compute the equilibrium constant for dimerization at each of these temperatures.

Determine the standard reaction enthalpy for this process.

Determine ΔG° and ΔS° for the dimerization reaction at 437 K.

Solutions

Expert Solution

ΔG° = ΔH - TΔS°, ΔG = -RTlnK

ΔG° = -8.314 X 437 X ln (0.740) = 1093.96 J

ΔS° = (ΔH -ΔG)/T = (-103000-1093.96)/437 = -471.396 J entropy decreases on dimerization

queen_honey_blossom answered 1 year ago

Next > < Previous

Related Solutions

Calculate the ionization constant of acetic acid: pH of 0.01 M acetic acid: 3.50 pH of...

Calculate the ionization constant of acetic acid: pH of 0.01 M acetic acid: 3.50 pH of 1.00 M acetic acid: 2.34

In this lab, we will titrate NaOH into Binegar (acetic acid) to determine its concentration. These...

In this lab, we will titrate NaOH into Binegar (acetic acid) to determine its concentration. These are the principle questions: - What is the reaction that occurs in this titration? - What does a titration measure, and how does it measure this quantity? - What is a titration curve? How would it differ for diprotic of triprotic acids? - What is an equivalence point? - How do you select an indicator?

1. Vinegar consists of acetic acid, CH3COOH, and water. Write out the equilibrium expression for acetic...

1. Vinegar consists of acetic acid, CH3COOH, and water. Write out the equilibrium expression for acetic acid reacting with water. 2. Citric acid, H3C6H5O7, contributes to the acidity of many foods. Write out the equilibrium expression for citric acid reacting with water to lose one acidic proton.

the acid-dissociation constant for benzoic acid is 6.3*10^-5. calculate the equilibrium constant concentration of h30+, C6H5COO-,...

the acid-dissociation constant for benzoic acid is 6.3*10^-5. calculate the equilibrium constant concentration of h30+, C6H5COO-, and C6h5COOH in the solution if the initial concentration of C6H5COOH is 0.050 M

Refer to the reaction performed in the Homogeneous Equilibrium Experiment: Acetic Acid + Ethanol <--> Ethylacetate...

Refer to the reaction performed in the Homogeneous Equilibrium Experiment: Acetic Acid + Ethanol <--> Ethylacetate + water A student mixes the following volumes together in a reaction flask: -HCl 0.00mL -Acetic Acid 1.00 mL -Ethanol 1.00mL -Ethylacetate 4.00 mL -Water 0.00 mL Which of the following is true concerning the equilibrium reaction under study? a) The reaction will shift to the right b) The reaction is at equilibrium c) The reaction will shift to the left d) The reaction...

a) you have a 2.00L container of 0.100M acetic acid (ka=1.80x10^-5) and you need to make...

a) you have a 2.00L container of 0.100M acetic acid (ka=1.80x10^-5) and you need to make a buffer solution of pH=4.90 to calibrate your pH meter. how many grams of sodium acetate (NaC2H3O2 MM=84.03g/mol) must you weigh out into the container of 0.100M acetic acid? Note: assume no significant volume change when Nac2H3O2 is added to the solution. b) in a separate beaker, you place 30 mL of the 0.100 M sodium acetate buffer and add 10 mL of 0.200M...

2. The equilibrium constant of a Weak Acid. A: pH of 25mL 0.10 M unknown acid...

2. The equilibrium constant of a Weak Acid. A: pH of 25mL 0.10 M unknown acid = 2.04 a) [H]? b) [A]? c) [HA(aq)]? d) Keq? B: pH of 25mL 0.20 M unknown acid + 5mL of 0.1M NaOH = 2.79 a) [H]? b) [A]? c) [HA(aq)]? d) Keq? C: pH of 15mL of 0.1M NaOH plus 30mL of Unknown Acid = 3.65 a) [H]? b) [A]? c) [HA(aq)]? d) Keq? I know the answers, but want to know how...

determine limiting reagent 16ml ethanol and 22 ml acetic acid

Deterime the % of Acetic Acid in vinegar in your kitchen. Show how to determine it...

Deterime the % of Acetic Acid in vinegar in your kitchen. Show how to determine it in words and make up random numbers to calculate it also. Determine the purity of an Aluminum can. In words how would you determine the purity? Also, make up random numbers to calculate how to find the purity of an Aluminum can. Identifiy the ions present in a sample possibly containing Ag+ Pb2+ Br2+ Na+ Ca2+. Construct a flowchart using these ions.

Sally chemist is attempting to determine the mass % of acetic acid in vinegar. Below is...

Sally chemist is attempting to determine the mass % of acetic acid in vinegar. Below is an excerpt from her lab book: A. Prepared vinegar analyte 25.0 mL vinegar mass of vinegar 25.20 grams added 75.0 mL H2O added 2 drops phenolphthalein temperature: 27.0 oC manufacturer's mass % acetic acid = 3.5 % B. Prepared burette filled with standardized NaOH solution 0.201 M C. Titration initial burette reading: 5.12 mL final burette reading: 78.67 mL solution is light pink 1....

Subjects