1. The thermochemical equation showing the formation of ammonia, NH3from its elements isAH - -92 kJNa(g) + 3H2[g) - 2NH3(g)This equation shows that 92 kJ of heat isA. lost to the surroundings when one mole of hydrogen is used up inthe reactionB. absorbed from the surroundings when one mole of nitrogen reactsC. absorbed from the surroundings when one mole of ammonia isformedD. lost to the surroundings when 2 moles of ammonia is formed2. Given the hypothetical thermochemical equation:A +B-C+DAH - -430 kJWhich among the following statements is correct about this reaction?A. the reaction is endothermicB. the equation may be written as A +B+ 430 kJ -C +DC. the heat content of C and D is greater than the heat content of Aand BD. the heat content of A and B is greater than the heat content of Cand D3. Which of the following is an example of an exothermic process?C. evaporation of waterD. sublimation of dry iceA. melting of iceB. freezing of water4. An oxyacetylene torch is a tool that mixes and burns oxygen and acetyleneto produce an extremely hot flame. This tool is used to cut steel or weldiron and other metals. The temperature of the film can reach 3480-C. Theburning of acetylene is given by the thermochemical equation:CH2ig + 3/2C0zi - COz + H20pFor the reaction: 2CO2ig + 2H2Op - 2C2Hzjg + 3CO21g)What is the AH for the reaction?AH = -1301.1 kJA. AH - 1301.1 kJB. AH - 2602.2 kJ5. The value of AH for the reaction below is -72 kJ. How many kJ of heat arereleased when 1.0 mol of HBr is formed in this reaction?C. AH - -1301.1 kJD. AH - -2602.2 kJH2(g) + Bra(g) - 2HBrg)C.-72A. 144B. 36D. 72B. Directions: Solve the following word problems. Write your answer on youranswer sheet.1. If the AH for C,H4 + H2 - CHe is -65.6 kJ, what is the AH for this reaction?CHo - CH, + H22. If the AH for C,H, + H2 - CHe is -65.6 kJ, what is the AH for this reaction?2C,H, + 2H2 - 2C,He

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1. The thermochemical equation showing the formation of ammonia, NH, from its elements is Nalg) + 3Ha(g) - 2NH»(g) AH - -92 kJ This equation shows that 92 kJ of heat is A. lost to the surroundings when one mole of hydrogen is used up in the reaction B. absorbed from the surroundings when one mole of nitrogen reacts C. absorbed from the surroundings when one mole of ammonia is formed D. lost to the surroundings when 2 moles of ammonia is formed 2. Given the hypothetical thermochemical equation: A+B-C•D AH - 430 kJ Which among the following statements is correct about this reaction? A. the reaction is endothermic B. the equation may be written as A•B+ 430 kJ -C +D C. the heat content of C and D is greater than the heat content of A and B D. the heat content of A and B is greater than the heat content of C and D 3. Which of the following is an example of an exothermic process? A. melting of ice B. freezing of water C. evaporation of water D. sublimation of dry ice

1. The thermochemical equation showing the formation of ammonia, NH, from its elements is Nalg) + 3Ha(g) - 2NH»(g) AH - -92 kJ This equation shows that 92 kJ of heat is A. lost to the surroundings when one mole of hydrogen is used up in the reaction B. absorbed from the surroundings when one mole of nitrogen reacts C. absorbed from the surroundings when one mole of ammonia is formed D. lost to the surroundings when 2 moles of ammonia is formed 2. Given the hypothetical thermochemical equation: A+B-C•D AH - 430 kJ Which among the following statements is correct about this reaction? A. the reaction is endothermic B. the equation may be written as A•B+ 430 kJ -C +D C. the heat content of C and D is greater than the heat content of A and B D. the heat content of A and B is greater than the heat content of C and D 3. Which of the following is an example of an exothermic process? A. melting of ice B. freezing of water C. evaporation of water D. sublimation of dry ice

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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1) Given the hypothetical thermochemical equation: A + B C+D∆H = -430 kJ/mol. Which among the following statements is correct about this reaction? A.The reaction is exodothermic. B.The heat content of C and D is greater than the heat content of A and B. C.The heat content of A and B is greater than the heat content of C and D. D.The equation may be written as A + B - C + D 430 kJ/mol 2)The variations in enthalpy that can not be detected per calorimeter can be detected with the aid of A.Newton's law B.Hess' law C.Ohm's law D.Krebs law 3)The thermochemical equation showing the formation of ammonia (NH3) from its elements is: N2(g) + 3H2(g) → 2NH3(g) ∆H = -92 kJ/mol. This equation shows that 92 kJ of heat is: A.Absorbed from the surroundings when one mole of ammonia is formed. B.Lost to the surroundings when one mole of C.hydrogen is used up in the reaction. Lost to the surroundings when 2 moles of ammonia is formed. D.Absorbed from the surroundings when one mole of…
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