University:
Central Michigan University
Course:
CHM 351 | Physical Chemistry I
Academic year:

2021
Views:

432

Pages:

3
Author:

folclord7m

Useful constants and select formulas R = 8.314 J L = 0.08206 atm ∙ mol ∙ K mol o o o ΔGrxn = ΔHrxn − TΔSrxn o ΔG = ΔG⬚ + RT(ln Q) Cs = q m × ΔT 101.3 J = 1 L ∙ atm ΔE = q + w K eq = exp ( ΔS = o −ΔG⬚ ) RT q = −Ccal × ΔT q T MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. Which of the reactions produces an increase in the entropy of the system? A. B. C. D. E. 2. Which of the following compound will NOT have ∆Hof = 0 kJ/mol? A. B. C. D. E. 3. 3 NO2 (g) + H2O (l) ⟶ 2 HNO3 (aq) + NO (g) CCl4 (l) + 4 HCl (g) ⟶ CH4 (g) + 4 Cl2 (g) 2 NO (g) + O2 (g) ⟶ 2 NO2 (g) C6H6 (l) + 3 H2 (g) ⟶ C6H12 (l) Mg (s) + 2 Cl2 (g) ⟶ MgCl2 (s) Cl2 (g) O2 (g) Na (s) I2 (s) PbSO4 (s) When 7.00 g of solid sodium hydroxide, NaOH, is dissolved in 100.0 g of water in a coffee-cup calorimeter (see the picture on the right), the temperature rises from 25.00oC to 85.66oC. Calculate ΔH in kJ/mol of NaOH for the process. The specific of water is 4.184 J/g-C. Molar mass of NaOH is 39.997 g/mol A. B. C. D. E. ΔH = 27.2 kJ/mol ΔH = 532.1 kJ/mol ΔH = 185.7 kJ/mol ΔH = –155.2 kJ/mol ΔH = –73.3 kJ/mol 4. A fuel is burned in a cylinder equipped with a piston. The initial volume of the cylinder is 30.0 L, and the final volume is 80.0 L. If the piston compresses against a constant pressure of 2.50 atm, how much work (in kJ) is done? (1 L-atm = 101.3 J) A. B. C. D. E. 5. –12.5 kJ –12.7 kJ –21.1 kJ 6.63 kJ 7.25 kJ Consider the following reaction: CaC2 (s) + 2 H2O (l) ⇋ Ca(OH)2 (aq) + C2H2 (g) If 15.0 g of CaC2 reacts with water at standard conditions, how much heat (in kJ) is released by the reaction? ΔHof of the reaction is –141.7 kJ/mol. Molar mass of CaC2 is 64.1 g/mol. A. B. C. D. E. 6. –47.5 kJ –7.84 kJ –390.1 kJ –41.6 kJ –33.2 kJ Choose the process from below which describes a change which is dependent of the path by which the change occurs. Read each statement carefully. A. B. C. D. E. The amount of work required to build a house. The heat released by the combustion of one liter of gasoline. The number of rotations the earth undergoes over a specified period. The potential energy gained by a satellite as it is shot into a specific orbit. The elevation-increase experienced by a person who travels from Louisiana to Alaska.

Thermodynamics Useful Constants and Key Equations

Related Documents

Recommended Documents

Description

Related Documents

Almost There!

Free up your schedule!

Take 5 seconds to unlock