Upon mixing these two solutions a a redox reaction occurs b an acid base

Upon mixing these two solutions a a redox reaction

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Upon mixing these two solutions: a. a redox reaction occurs b. an acid-base reaction occurs c. a decomposition reaction occurs d. a precipitation reaction occurs e. no reaction occurs PRACTICE: A refrigerator uses 900 kWh of electrical energy per year. How many joules of electricity are used in two years? A. 3.24 x 10 9 J B. 6.48 x 10 9 J C. 2.50 x 10 -4 J D. 5.00 x 10 -4 J * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 46
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: Calculate the amount of work done when 2.5 mole of H 2 O vaporizes at 1.0 atm and 25°C. Assume the volume of liquid H 2 O is negligible compared to that of vapor. (1 L atm = 101.3 J) 1) -61.9 J 2) -6.19 kJ 3) 61.9 J 4) 5.66 kJ 5) 518 J SUMMARY: Endothermic & Exothermic Reactions * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 47
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: Predict whether the following reactions will be exothermic or endothermic. PRACTICE: Consider the combustion of fuel and the analogous reaction the food undergoes as part of the metabolic processes: fuel/food + O 2 (g) CO 2 (g) + H 2 O (l) The reverse of this reaction that occurs during photosynthesis is also pretty important: CO 2 (g) + H 2 O (l) fuel/food + O 2 (g) Is this reaction endothermic or exothermic? Explain your reasoning. * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 48
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: A 2.78g lead weight, initially at 11.0°C, is submerged in 7.66g of water at 52.3°C in an insulated container. What is the final temperature of both the weight and the water at thermal equilibrium? * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 49
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* PRACTICE: Diamond and graphite are two crystalline forms of carbon. At 1 atm and 25°C, diamond changes to graphite so slowly that the enthalpy change of the process must be obtained indirectly. Using equations from the list below, determine Δ H for C(diamond) C(graphite) (1) C(diamond) + O 2 (g) CO 2 (g) Δ H = −395.4 kJ (2) 2CO 2 (g) 2CO(g) + O 2 (g) Δ H = 566.0 kJ (3) C(graphite) + O 2 (g) CO 2 (g) Δ H = −393.5 kJ (4) 2CO(g) C(graphite) + CO 2 (g) Δ H = −172.5 kJ PRACTICE: S(s) + O 2 (g) SO 2 (g) ΔH = 296.8 kJ 2SO 2 + O 2 2SO 3 ΔH = 198.4 kJ Write the equation for the formation of sulfur trioxide gas from sulfur solid and oxygen. What is the ΔH of that equation? * This review was not prepared by your professor or school and is neither approved nor endorsed by your college or university 50
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ECU - GENERAL CHEMISTRY I - PROF. SPUCHES ECU CHEM 1150 SPUCHES EXAM 2 REVIEW* SUMMARY: Enthalpy of Formation PRACTICE: Find the ΔH o f for propanol, C 3 H 8 O(l), given the following information: C 3 H 8 O (I) + 9/2 O 2 (g) 3 CO 2 (g) + 4 H 2 O (g) ΔH o comb
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