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 nitrogen reacts. 4)A reaction is allowed to take place in an insulated container containing 100mL of water. If the reaction is exothermic, what happens to the temperature of water? A. The temperature of the water goes up. B None of the above. C. The temperature of the water goes down. D. The temperature of the water does not change. 5) The standard condition for enthalpy changes are A. temperature 298K B. all of these C. normal physical state D. the pressure of 1 atm

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 nitrogen reacts. 4)A reaction is allowed to take place in an insulated container containing 100mL of water. If the reaction is exothermic, what happens to the temperature of water? A. The temperature of the water goes up. B None of the above. C. The temperature of the water goes down. D. The temperature of the water does not change. 5) The standard condition for enthalpy changes are A. temperature 298K B. all of these C. normal physical state D. the pressure of 1 atm

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