23. Write thermochemical expressions for the decomposition of one mole of the each compound into the elements in their stastates at 25°C and 1 bar.a) ethanol, CH,OH()b) sodium fluoridels)) magnesium sulfate(s)d) ammonium nitratels)

The thermo-chemical expressions for the decomposition of one mole of the compound into the…

Answered: 23. Write thermochemical expressions…

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter2: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 2.35E: A piston having 7.23 g of steam at 110 C increases its temperature by 35 C. At the same time, it...

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Consider the reaction between methane and oxygen producing carbon dioxide and water. Suppose that the reaction is carried out in a furnace used to heat a house. If q=890kJ and w=+5kJ, what is E? H at 25C?
Natural gas is mostly CH4. When it burns, the chemical reaction is CH4 g 2O2 g CO2 g 2H2O g The H of combustion of one mole of CH4 at 25.0 C is -890.9 kJ. Calculate q, w, and U under these conditions, assuming an external pressure of 1.07 atm.
When 1.000 g of ethylene glycol, C2H6O2, is burned at 25C and 1.00 atmosphere pressure, H2O(l) and CO2(g) are formed with the evolution of 19.18 kJ of heat. a Calculate the molar enthalpy of formation of ethylene glycol. (It will be necessary to use data from Appendix C.) b Gf of ethylene glycol is 322.5 kJ/mol. What is G for the combustion of 1 mol ethylene glycol? c What is S for the combustion of 1 mol ethylene glycol?
The reaction SO3(g)+H2O(l)H2SO4(aq) is the last step in the commercial production of sulfuric acid. The enthalpy change for this reaction is 227 kJ. In designing a sulfuric acid plant, is it necessary to provide for heating or cooling of the reaction mixture? Explain.
Hesss law is really just another statement of the first law of thermodynamics. Explain.
Calculate G forH2O(g)+12O2(g)H2O2(g) at 600. K, using the following data: H2(g)+O2(g)H2O2(g)K=2.3106at600.K2H2(g)+O2(g)2H2O(g)K=1.81037at600.K
A piston having 7.23 g of steam at 110 C increases its temperature by 35 C. At the same time, it expands from a volume of 2.00 L to 8.00 L against a constant external pressure of 0.985 atm. Calculate w, q, U, and H for the process.
Natural gas (methane) is being used in experimental vehicles as a clean-burning fuel. (a) Write the equation for the combustion of CH4(g), assuming that all reactants and products are in the gas phase. (b) Use data from Appendix E to calculate S for this reaction. (c) Calculate G and show that the reaction is spontaneous at 25°C.
9.23 Which system does not work: (a) E=436J , q=400J ; or E=317J , q=347J ?
Consider a sample containing 5.00 moles of a monatomic ideal gas that is taken from state A to state B by the following two pathways: For each step, assume that the external pressure is constant and equals the final pressure of the gas for that step. Calculate q, w, E and H for each step in kJ, and calculate overall values for each pathway. Explain how the overall values for the two pathways illustrate that E and H are state functions, whereas q and w are path functions. Hint: In a more rigorous study of thermochemistry, it can be shown that for an ideal gas: E=nCvTand H=nCpT where Cv is the molar heat capacity at constant volume and Cp is the molar heat capacity at constant pressure. In addition, for a monatomic ideal gas, Cv=32R andCp=52R , where R = 8.3145 J/K mol.

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23. Write thermochemical expressions for the decomposition of one n states at 25°Cand 1 bar. a) ethanol, C,H,OH(E) b) sodium fluoride(s) ) magnesium sulfate(s) d) ammonium nitrate(s)