Concept explainers
(a)
Interpretation: The
Concept introduction: The
(b)
Interpretation: The
Concept introduction: The chemical reactions in which energy is released during the formation of products known as exothermic reactions. The energy released during the reaction is denoted by
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Organic Chemistry
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- Given the listed average bond energies (BE), calculate the enthalpy change for the production of one mole of methanol (CH3OH) by the following reaction. (There are two C=O double bonds in CO2) CO2(g) + 3 H2(g) → CH3OH(g) + H2O(g) B.E.C–O = 300 kJ/mol B.E.C=O = 700 kJ/mol B.E.H–H = 450 kJ/mol B.E.H–O = 500 kJ/mol B.E.H–C = 400 kJ/mol Select one: a. -250 kJ b. -950 kJ c. 950 kJ d. 50 kJ e. 250 kJarrow_forwardWrite a balanced equation for the formation of CO2(g) from C(s) and O2(g). Calculate the enthalpy change for this reaction using the following data (at 25 degrees Celsius): C(s) + 1/2 O2(g) --> CO(g) change in H = -111 kJ CO(g) + 1/2 O2(g) --> CO2(g) change in H = -394 kJ Is the reaction endothermic or exothermic?arrow_forwardConsider the two products CO2 and H2O for the combustion of ethanol. Use what you have learned about molecular geometry, polarity, and intermolecular forces to explain why CO2 is a gas at room temperature but H2O is a liquid at room temperature.arrow_forward
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