If the reaction is not spontaneous under standard conditions at 298K, at what temperature (if any) would the reaction become spontaneous? a) 2 PbS (s) + 3 O2 (g) → 2 PbO (s) + 2SO2 (g) ; ΔH° = -844 kJ; ΔS°= -165 J/K b) 2 POCl3 (g) → 2 PCl3 (g) + O2 (g) ; ΔH° = 572 kJ; ΔS°= 179 J/K 5. Consider the reaction H2 (g) + F2 (g) → 2 HF (g). a) Using data in your Appendix B, calculate ΔG° at 25°C b) Calculate ΔG at 298K if the reaction mixture consists of 8.0 bar of H2, 4.5 bar of F2 and 0.36 bar of HF. 6.
Multiply each term by the common ratio to find the next three terms. 25 × 0.5 = 12.5 12.5 × 0.5 = 6.25 6.25 × 0.5 = 3.125 The next three terms of the sequence are 12.5, 6.25, and 3.125. 7. 4, −1, ,… SOLUTION: Calculate the common ratio. The common ratio is × × × = = = .
o D. The mass is not exactly 255.0 grams, but it is impossible to tell whether the mass is greater than or less than 255.0 grams. 5. 5. You place a mass of 250 grams on the measurement tray of a triple beam balance and then set the rider on the 500 gram beam to the 200 gram mark (the other riders are set to 0 grams). Which of the following statements is true?
__32 degrees Fahrenheit____ 2. What is the initial body temperature? __99 degrees Fahrenheit______ 3. Next to each factor listed below, write “increase,” “decrease,” or “same” based on how you expect that factor to affect body temperature. Raising air temperature: ____increase______ Sweating: ___decrease_____ Lowering air temperature: ____decrease_____ Shivering: ___increase_____ Adding clothing: ___increase_____ Exercising: ____increase______ |Activity A: |Get the Gizmo ready: |[pic] | |
| Answer 4 | Electromagnetic radiation of wavelength 2 micrometres is referred to as _______ radiation. | Answer 5 | Visible light has a ________ of between about 400 and 800 nanometres. | Answer 6 | Feedback You have correctly selected 6. Correct Marks for this submission: 10.00/10.00. Question 2 Correct Mark 10.00 out of 10.00 Flag question Question text Sizes of Astronomical Objects — Rank the following objects in size from Largest to Smallest.
Practice Question for Exam 2 Chem 103 |A chemical reaction requires 30.77 kJ. How many kilocalories does this correspond to? | |A) 7,354 kcal B) 7.354 kcal C) 128.7 kcal D) 0.1287 kcal E) 30.77 kcal | |776 J is the same quantity of energy as | |A) 7.76 × 105 kJ. B) 1.85 × 102 kcal. C) 0.185 kcal.
To do that we had to count the molar mass (M) of zinc sulfate. Then we multiplied the amount of zinc sulfate in moles with the molar mass. Then the answer was the mass (m) of the zinc sulfate to add in grams. M(ZnSO4) = (65.38 + 32.06 + 4 x 16.00) g/mol = 161.44 g/mol n (ZnSO4) = 0.02 mol M (ZnSO4) = 161.44
18. Which graph shows the relationship between activation energy (Ea) and temperature? 19. Consider the following reaction: CH4(g) + 2O2(g) ( CO2(g) + 2H2O(g) At a certain temperature, 1.0 mol CH4 is consumed in 4.0 minutes. The rate of production of H2O is A.
Likewise, to format a specific row, column, or cell, you must select the table parts and then apply the format. Editing features such as delete and undo work in the usual manner. Follow these steps to select various parts of the table: |To select |Move the insertion point: | |Entire Table |Over the table and click the table move handle in the upper left of the table. (Option: Table menu, Select, Table). To | | |move the table, drag the table move handle to a new location.
FREE FALL ACCELERATION Section : 03 Name & Surname : Partner’s Name : Instructor’s Name : Experiment Date : Submission Date : ABSTRACT In this experiment our aim was to examine the relationship between height and how long it takes the sphere to reach the ground after being dropped from rest. We used a falling sphere apparatus, a release unit, a meter scale, a digital timer and graph papers. We measured falling time of the sphere dropped from rest at 5 different heights. The measurements showed that as the height decreases, time for the sphere to reach the tray decreases too. THEORY Every object near the surface of the Earth is subject to a gravitational force which is toward the center of the Earth.