The standard state for entropy in thermodynamics is 25C and 1 bar.
OPTION C
So the standard entropy is the entropy of the substance in its stable state at 25C and 1 bar pressure.
The standard entropy of a substance refers to its entropy at: Select the correct answer below:...
How does the standard entropy of a substance depend on its molar mass? 1. The standard entropy of a substance does not depend on its molar mass. 2. The larger the molar mass, the greater the entropy. 3. The larger the molar mass, the lower the entropy.
Absolute Entropy Sº, in moll K1 3. Use the following table and rxn to answer the questions. Standard Heat of Substance Formation, AH, in kJ moli C(s) 0.00 CO2(g) -393.5 H2(g) H2O(1) -285.85 O2(g) 0.00 C3H2COOH(1) 0.00 5.69 213.6 130.6 69.96 205.0 226.3 The enthalpy change for the combustion of butyric acid at 25°C, AH"comb, is-2,183.5 kilojoules per mole. C3H7COOH(1) + 5O2(g) = 4CO2(g) + 4H20(1) a) From the data above, calculate the standard heat of formation, AH,, for butyric...
Which substance has the greatest value for the constant b? Select the correct answer below: O2 CCl, O co, O He
Q1. a. At absolute zero temperature, the entropy of a pure crystalline substance is zero. Justify the statement. Why entropy becomes zero at absolute zero temperature. b. A metal rod is keeping in a moisture surrounding for long time. From your thermodynamics basics explain whether this rod is under thermodynamic equilibrium or not? Give reasons for the same. c. Explain the application of thermodynamics based on any two components of automobile.
If the number of particles of a substance decreases then the change in entropy of the substance is: Select one: O a. Dependent on the substance. O b. Positive o o c. Dependent on the temperature of the substance. d. Negative e . No change
A common substance used as an inert electrode is: Select the correct answer below: platinum aluminum titanium silver
The entropy change for NH,(9) + NH3(aq) will probably be: Select the correct answer below: Negative Positive Neither negative or positive It is impossible to tell
Which of the following statements about the standard molar entropy (S°) is true? Select one: a. The standard molar entropies for a substance are determined from the heat capacity b. The standard molar entropies for elements in their standard states is zero c. S° for F2(g) is less than S° for Br2(g) because F2 is lighter than Br2 d. S° generally increases with the size of the molecule (I.e. the number of atoms) e. None of the above
Which of the following statements are true (select ALL that apply) (a) The standard entropy of any compound is greater than 0. (b) For a given compound the entropy of a molecule in the gas phase is higher than in a liquid at the same temperature. (c) In a spontaneous process the entropy of the system always increases (d) In a spontaneous process the entropy of the universe always increases. (e) The reaction entropy is always positive. (f) The standard...