A chemist measures the enthalpy change AH during the following reaction: C6H12O6(s)-2 CO2(g) + 2 C2H5OH (1) AH=-69. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ. reaction ΔΗ x10 4CO2(g) + 4C,H,OH(1) 2C6H12O6(s) 2CO2(g) + 2C,H₂OH(1) C6H12O6(s) ->>> 3C6H12O6(s) 6CO2(g) + 6C₂H₂OH(1) ☐ kJ kJ ☐ kJ

Determine the ΔH of the following reactions. 1.) CH4 (g) + 2 O2 (g) à CO2 (g) + 2 H2O (l)     2.) CH4 (g) + 2 O2 (g) à CO2 (g) + 2 H2O (g) What is the numerical difference between these two values?   What is the only physical difference between the two reactions?

Which of the following reactions is accompanied by an increase in enthalpy? Select one: O 2s03(g) – 2S02(g) + O2(g) A,H" = +197 kJ O 2NO(g) + O2(g) - 2NO2(g) + 113 kJ O 2H2(g) + O2(g) - 484 kJ – 2H20(g) 4HCI(g) + 02(g) - 2H20(g) + 2Cl2(g) A,H' = -111.4 kJ

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According to the reaction below what is the value of KKJ for the complete combustion of 1.00 g of CH4g?

Use the standard reaction enthalpies given below to determine AH°rxn for the following reaction: Given: S(s) + 3/2 O2(g) → SO3(g) SO ₂(g) →S(s) + O₂(g) 2 SO2(g) + O2(g) → 2 SO3(g) AHᵒrn = ? AHᵒrn = +297 kJ AH rxn-198 kJ

When a 7.41-g sample of solid potassium chlorate dissolves in 59.3 g of water in a coffee-cup calorimeter (see above figure) the temperature falls from 22.00 oC to 12.96 oC. Calculate H in kJ/mol KClO3 for the solution process. KClO3(s)  K+(aq) + ClO3-(aq)   The specific heat of water is 4.18 J/g-K.Hsolution = _________ kJ/mol KClO3.

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use the standard reaction enthalpies given below to determine ▲H°rxn for the following reaction (see image)

（1）Consider the reaction: 2A (g) + 3 B (g) → 2 C (g)     ΔHrxn = +254.3 kJ What will be the enthalpy change (in kJ) if 0.471 mol B reacts in excess A?   （2）Consider the reaction: C (s) + O2 (g) → CO2 (g)     ΔHrxn = -393.5 kJ What mass of carbon (in g) must be reacted via this mechanism to release 581.2 kJ of heat?