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1) An oxyacetylene torch is a tool that mixes and burns oxygen and acetylene to produce an extremely hot flame. This tool is used to cut steel or weld iron and other metals. The temperature of the film can reach 3480°C. The burning of acetylene is given by the thermochemical equation:C2H2(g) + 1%CO2(g) → CO2(g) + H2O(1) AH-1301.1 kJ. For the reaction, 2CO2(g) + 2H2O(1)→ 2C2H2(g) + 3CO2(g) what is the ∆H for the reaction? A. ∆H-1301.1 kJ/mol B. ΔΗ = - 2602.2 kJ/mol C. ΔΗ = +1301.1 kJ/mol D. ΔΗ = +2602.2 kJ/mol 2) The change in the energy between a chemical reaction and the surroundings at constant temperature is called A. enthalpy change B. enthalpy profile C. enthalpy D. dynamic enthalpy 3) Changes in enthalpy in an exothermic reaction is A. neutral B. negative C. constant D.positive 4) The heat of reaction refers to A. The heat released after burning 1 mole of a substance. B. The heat released or absorbed during a chemical reaction. C. The amount of heat needed to melt 1 mole of a solid. D. The heat released by 1 mole of a substance as it changes from a liquid to a solid.

1) An oxyacetylene torch is a tool that mixes and burns oxygen and acetylene to produce an extremely hot flame. This tool is used to cut steel or weld iron and other metals. The temperature of the film can reach 3480°C. The burning of acetylene is given by the thermochemical equation:C2H2(g) + 1%CO2(g) → CO2(g) + H2O(1) AH-1301.1 kJ. For the reaction, 2CO2(g) + 2H2O(1)→ 2C2H2(g) + 3CO2(g) what is the ∆H for the reaction? A. ∆H-1301.1 kJ/mol B. ΔΗ = - 2602.2 kJ/mol C. ΔΗ = +1301.1 kJ/mol D. ΔΗ = +2602.2 kJ/mol 2) The change in the energy between a chemical reaction and the surroundings at constant temperature is called A. enthalpy change B. enthalpy profile C. enthalpy D. dynamic enthalpy 3) Changes in enthalpy in an exothermic reaction is A. neutral B. negative C. constant D.positive 4) The heat of reaction refers to A. The heat released after burning 1 mole of a substance. B. The heat released or absorbed during a chemical reaction. C. The amount of heat needed to melt 1 mole of a solid. D. The heat released by 1 mole of a substance as it changes from a liquid to a solid.

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.101QE: In the 1880s, Frederick Trouton noted that the enthalpy of vaporization of 1 mol pure liquid is...
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1) An oxyacetylene torch is a tool that mixes and burns oxygen and acetylene to produce an extremely hot flame. This tool is used to cut steel or weld iron and other metals. The temperature of the film can reach 3480°C. The burning of acetylene is given by the thermochemical equation:C2H2(g) + 1%CO2(g) → CO2(g) + H2O(1) AH-1301.1 kJ. For the reaction, 2CO2(g) + 2H2O(1)→ 2C2H2(g) + 3CO2(g) what is the ∆H for the reaction? A. ∆H-1301.1 kJ/mol B. ΔΗ = - 2602.2 kJ/mol C. ΔΗ = +1301.1 kJ/mol D. ΔΗ = +2602.2 kJ/mol 2) The change in the energy between a chemical reaction and the surroundings at constant temperature is called A. enthalpy change B. enthalpy profile C. enthalpy D. dynamic enthalpy 3) Changes in enthalpy in an exothermic reaction is A. neutral B. negative C. constant D.positive 4) The heat of reaction refers to A. The heat released after burning 1 mole of a substance. B. The heat released or absorbed during a chemical reaction. C. The amount of heat needed to melt 1 mole of a solid. D. The heat released by 1 mole of a substance as it changes from a liquid to a solid.
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