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Standard entropy of reaction

We may also calculate AG° for a reaction by using the standard enthalpy and standard entropy of reaction ... [Pg.254]

Data for secondary master species and product species include the stoichiometry and logI0 K° of the formation reactions, the standard Gibbs energy of reaction (ArGm), the standard enthalpy of reaction (Athe standard entropy of reaction (Ar5m), the standard isobaric heat capacity... [Pg.564]

Standard Molar Entropies and Standard Entropies of Reaction... [Pg.721]

Once we have values for standard molar entropies, it s easy to calculate the entropy change for a chemical reaction. The standard entropy of reaction, AS°, can be obtained simply by subtracting the standard molar entropies of all the reactants from the standard molar entropies of all the products ... [Pg.731]

Calculate the standard entropy of reaction at 25°C for the synthesis of ammonia ... [Pg.732]

To determine the sign of AStotai = ASsys + ASsurr/ we need to calculate the values of ASsys and ASsurr. The entropy change in the system equals the standard entropy of reaction and can be calculated using the standard molar entropies in Table 17.1. To obtain ASsurr = —AH°/T, first calculate AH° for the reaction from standard enthalpies of formation (Section 8.10). [Pg.735]

The standard molar entropy, S°, of a substance is the absolute entropy of 1 mol of the pure substance at 1 atm pressure and a specified temperature, usually 25°C. The standard entropy of reaction, AS0, can be calculated from the relation AS° = S°(products) — S°( reactants). [Pg.752]

What is meant by the standard molar entropy of a substance How are standard molar entropies used to calculate standard entropies of reaction ... [Pg.756]

What are the units of (a)standard molar entropies and (b) standard entropies of reaction Why are standard molar entropies sometimes called absolute entropies ... [Pg.756]

The reaction is exothermic in the standard state (negative AH°, the more negative the better). The reaction has a positive standard entropy of reaction (AS° > 0, final state more random). [Pg.108]

The Standard Entropy of Reaction Entropy Changes in the Surroundings Entropy Change and the Equilbrium State Spontaneous Exothermic and Endothermic Reactbns... [Pg.650]

Entropy Changes in the System Standard Entropy of Reaction (A5°xn)... [Pg.661]

SAMPLE PROBLEM 20.2 Calculating the Standard Entropy of Reaction, A5°xn Problem Calculate A5 xn for the combustion of 1 mol of propane at 25°C ... [Pg.662]

The standard entropy of reaction, AS°xn, is calculated from S° values. When the amount (mol) of gas (AOgas) increases in a reaction, usually ASfxn > 0- The value of ASsurr is related directly to AH ys and inversely to the T at which the change occurs. In a spontaneous change, the entropy of the system can decrease only if the entropy of the surroundings increases even more. For a system at equilibrium, ASuniv = 0-... [Pg.665]

ArG values are obtained from the standard enthalpy of reaction ArH and standard entropy of reaction ArS according to Equation (3.1.2-10) ... [Pg.243]

See other pages where Standard entropy of reaction is mentioned: [Pg.476]    [Pg.40]    [Pg.732]    [Pg.752]    [Pg.169]    [Pg.88]    [Pg.731]    [Pg.750]    [Pg.661]    [Pg.662]    [Pg.676]    [Pg.846]    [Pg.166]    [Pg.635]    [Pg.98]    [Pg.325]    [Pg.828]    [Pg.1108]    [Pg.756]    [Pg.169]   
See also in sourсe #XX -- [ Pg.284 , Pg.285 , Pg.286 , Pg.287 ]



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