Homework Answers
Solution:
Free energy of mixing is calculated as,
ΔGmix = n1 RT ln X1 + n2 RT ln X2
Given,
n1 = 2 mol H2
n2 = 4 mol N2
Mole fraction of H2 = X1 = 2 /2+4 = 2/6 = 1/3
Mole fraction of N2 = X2 = 4 /2+4 = 4/6 = 2/3
T = 25 + 273 = 298 K
R = 8.314 J K-1 mol-1
Therefore,
ΔGmix = 8.314 x 298 ( 2 x ln 1/3 + 4 x ln 2/3)
= 2477.572 x ( 2 x - 1.11 + 4 x - 0.40)
= 2477.572 ( - 2.22 - 1.60)
= - 9464.325 J = - 9.46 kJ
Add Answer to:
Constant: R -8.314 J K mol-0.08314 dmbar K'mol-0.08206 dm atm K mol (3 Points) A container...
Q1) Q2) Take R = 0.08206 L atm/mol K or 8.314 J /mol K if you...
Q1)
Q2)
Take R = 0.08206 L atm/mol K or 8.314 J /mol K if you need
Thank you
9.47 g of a polystyrene sample was dissolved in acetone to make 135 mL of solution, and the osmotic pressure was measured to be 10.6 torr at 27°C. a) What is the molarity of the polystyrene solution? [Select] y x104M b) What is the approximate molar mass of the polystyrene? (Select] x 105 g/mol (Correct your answers to 3 sig. fig.)...
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An ideal gas at 22 °C is in a sealed rigid cubic container with a volume of 113 cm at a pressure of 1.00 atm. It is heated by 55 °C to 77 °C. a) Draw a diagram. Label quantities for the initial situation with a subscript “1”, and quantities in the final situation with a subscript “2”. b) How many moles are...
Q1)
Q2)
Take R = 0.08206 L atm/mol K or 8.314 J /mol K if you need
Thank you
9.47 g of a polystyrene sample was dissolved in acetone to make 135 mL of solution, and the osmotic pressure was measured to be 10.6 torr at 27°C. a) What is the molarity of the polystyrene solution? [Select] y x104M b) What is the approximate molar mass of the polystyrene? (Select] x 105 g/mol (Correct your answers to 3 sig. fig.)...
R = universal gas constant = 0.08206 L *atm/mol *K 3. (6 pt) Use this information to answer the following three questions: You have 2.05 mol of nitrogen gas in a flexible, sealed 420 mL container at room temperature (25°C) that has an internal pressure of 542 mm Hg. a. The volume of the container is expanded to 560. mL. What is the new pressure of the container? b. The container is heated to 60°C, what is the new pressure...
Data possibly uselul to all prouteS Im-1000 dm, R-0.082 (Latm)(mole K)-8.314 J/(mol K)- 1.987 cal/(mol ) Problem 1 (6 out of 30 points) The second order gas phase irreversible reaction: 2.4-B is carried out in an isothermal batch reactor containing 40 kg of catalyst and with an initial volume of 60-liter. The reactor is initially filled with equal molar quantities of A and inert I at 300 K and 2.5 atm. Calculate the time needed for the concentration of product...
R-0.08206 (atm - L)(mol - K)= 8.314 J/(mol-K) pH = -log[H30) pOH = -log(OH) pX=-logX [HO'] = 10 Ph. K, EK.(RT) pH + pOH = 14 = pK+pKb [OH (H:0= 10-14 = K, * Ks (in water at 25°C) pH =pK, + log([base)/(acid]) pOH =pKy + log (acid]/[base]) Molar Solubility = (*+ m for a salt that dissociates into ions with coefficients of n and m - b b -4ac where 0 = ax + bx+c VA= A/ X=- 1)...
Constant R = 0.08206 L atm mol K 1. (1 pt) Convert 187.2 Torr to atmospheres. 2. (2 pts) Calculate the pressure of 1.64 mol of a perfect gas that occupies a volume of 21.4 L at room temperature (25°C). 3. (2 pts) What is the molar mass of a 28.0 g sample of a perfect gas that occupies a volume of 22.4 L at a pressure of 1.00 atm and at a temperature of 0°C? Name (print): Section No....
Relevant Data: R=8.314 J/mol-K, 1 atm=101325 Pa=1.01325 bar = 760 mmHg 1. The nonideal binary solution of n-pentanol (1) and n-hexane (2) at 30 °C has been fitted into a Wilson equation with the parameter values equal to 2,2 =1718 cal/mol and az, = 166.6 cal/mol. The two species at 30 °C have the following molar volumes and vapor pressures, JŮ = 108 cm /mol ſv = 130 cm /mol pel = 3.23 mmHg P"= 187.1 mmHg (a) (10 pts)...
For the gas constant, use R = 8.314 J/mol-K For Avogadro's number, use N_0 = 6.022 times 10^23 molecules. Be careful of units! All the conversions you need are in the information section of the lab. Suppose the volume of the syringe is 47.5 cc. You measure the pressure as 1.58 atm, and the temperature as 19.8 degree C. Assume: the diameter of the plunger on the syringe is 1.44 cm. Find the number of moles of gas in the...
Data possibly useful to all problems: 1m2 -1000 dm2, R-0.082 (L*atm)/(mole*K)= 8.314 3/(mol K)- 1.987 cal/(mol K) Problem 1 (8 points out of 25) The first order gas phase reaction: A> 2B with k'-0.3 mole/(kg-catalyst*min* atm) takes place in isothermal packed bed reactor. The feed, which is 75% in A and 25 % inert, enters the reactor at 400 K and total pressure of 10 atm with the total flow rate of 40 mole/min. If there is no pressure drop...
Data: 1.0 atm = 1.01 × 105Pa; R = 8.314 J/mol·K; k =
1.38 × 10−23 J/K
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