3- the boiling point if its nonpolar then the highest in mass, the stronger they are (if the are nonpolar). If they are polar then the smaller the radius and the larger charger the higher the boiling point. (if there is any information to add, please do so).
4- The Clasius Clapeyron equation is used, correct? If so, the equation would be ln(p2/1atm) = -38.56/8.314 x (1/348 - 1/351). For some reason though I am getting .99 at rather than .89
5- For enthlapy of Fusion is q = Enthlapy x moles. Because it is released, then it is exothermic which is negative. So 11.8/10 and being exothermic -1.18
6 and 7 I understand that. No need to explain
8- What equation is to calculate the lattice?
9 - Can you explain how the answer was picked? The options are not there but out of those options, it was (a) AI
10- For the band gap, the lower it goes down the periodic table, the lower the band gap (correct?)
11 - For this problem I have no idea which equation to use and I do not understand the problem.
12 - Same with this question as well.
3. Select the molecule that will have the highest boiling point.d. 2 4. The normal boiling point of ethanol is 78°C with AKvapº-38.56 kJ/molWhat is the vapor pressure of ethanol at 75 °C? d. 0.89 atm 5. When 10.0 mol of ArW) Ar(s), 118kJ heat is released. What is the enthalpy of fusion of argon? C. -1.18kJ/mol 6. Which of the following is body centered cubic? B. 7. How many atoms are inside this unit cell? C. 4 4ne, , r2 8. Which salt will have the most negative lattice energy? (Recall, F .a) C. Be0 9. Which dopant element can turn Ge into a n-type semiconductor? a. As 10. Which element, when it is a solid, will have the smallest band gap?e. Al 11. What is the vapor pressure of a 1.20 mol sugar dissolved in 21.0 mol iso-propanol solution? Po(iso- propanol)=35.0 torre e. 33.1 torr 12. What pressure of refrigerant R31 (CH2FCIis required to make a saturated 0.10 M CH2FCI solution? KHCH2FCI) = 015 M/atm. b. 0.67 atm
A research article indicates that concentration of A should vary with time according to the following expression:
CA(t)=11CA0+kt
(1)
where CA0 (mol/L) is the initial concentration of A in the reactor [CA(t=0)] and k is called the reaction rate constant. Despite being called a constant, k is a strong function of the absolute temperature in the reactor:
k(T)=k0 expâEaRT(K)
(2)
In this equation (known as the Arrhenius equation after the Swedish chemist who proposed it), k0 is a constant, Ea(J/mol) is the reaction activation energy, and R=8.314 J/(mol·K) is the universal gas constant. Your task will be to verify that the expressions for CA(t) and k(T) fit the data, and if they do, to determine the parameters CA0 and k at each temperature and then the constants k0 and Ea.
(a)
What are the units of k, k0, and Ea if CA is in mol/L and t is in min?
(b)
Transform Equation 1 into an equation of the form y=at+b, so that if Equation 1 is valid, a plot of yvs. t would be a straight line. How would you determine CA0 and k from the slope and intercept of the line?
(c)
Create an Excel spreadsheet with the structure shown as Rows 1-10 in the figure at the end of this problem statement, and fill in the data table in Columns A-I. Then create the four scatterplots shown in Rows 15-21. In the âTrendlineâ options of each plot, check the boxes for âDisplay equation on chartâ and âDisplay R-squared value on chartâ but not the one for âSet intercept.â R2 is the coefficient of determination (it has several other names as well), and provides a measure of how well a straight line fits a set of data: the closer it is to 1, the better the fit. What can you conclude about Equation 1 from the four plots?
(d)
From the four trendline equations, calculate the values of k and CA0 for each of the four experimental temperatures and fill in Columns B-I in Rows 12 and 13 of the spreadsheet.
(e)
Enough A was initially added to the tank to make the initial concentration CA0=0.25 mol/L, yet you calculated four different values of CA0 in Part d. How do you explain this result?
