Search results
Results from the WOW.Com Content Network
The standard molar entropy at pressure = is usually given the symbol S°, and has units of joules per mole per kelvin (J⋅mol −1 ⋅K −1). Unlike standard enthalpies of formation, the value of S° is absolute. That is, an element in its standard state has a definite, nonzero value of S at room temperature. The entropy of a pure crystalline ...
The change in entropy (ΔS°) at the normal phase transition temperature is equal to the heat of transition divided by the transition temperature. The SI units for entropy are J/(mol·K). Absolute entropy of strontium. The solid line refers to the entropy of strontium in its normal standard state at 1 atm pressure. The dashed line refers to the ...
Standard molar entropy, S o liquid? J/(mol K) Heat capacity, c p: 80.80 J/(mol K) Gas properties Std enthalpy change of formation, Δ f H o gas: −45.556 ± 0.029 kJ/mol [3] Std Gibbs free energy change of formation, Δ f G o gas: −16.6 kJ/mol Standard molar entropy, S o gas: 192.77 J/(mol K) Heat capacity, c p: 35.06 J/(mol K) Heat capacity ...
The standard state of a material (pure substance, mixture or solution) is a reference point used to calculate its properties under different conditions.A degree sign (°) or a superscript Plimsoll symbol (⦵) is used to designate a thermodynamic quantity in the standard state, such as change in enthalpy (ΔH°), change in entropy (ΔS°), or change in Gibbs free energy (ΔG°).
The standard Gibbs free energy of formation (G f °) of a compound is the change of Gibbs free energy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 bar of pressure and the specified temperature, usually 298.15 K or 25 °C).
of formation, Δ f H o solid? kJ/mol Standard molar entropy, S o solid? J/(mol K) Heat capacity, c p? J/(mol K) Liquid properties Std enthalpy change of formation, Δ f H o liquid? kJ/mol Standard molar entropy, S o liquid? J/(mol K) Heat capacity, c p? J/(mol K) Gas properties Std enthalpy change of formation, Δ f H o gas: −74.6 kJ/mol [8 ...
J/(mol K) Liquid properties Std enthalpy change of formation, Δ f H o liquid –169.7 kJ/mol Standard molar entropy, S o liquid: 208.53 J/(mol K) Enthalpy of combustion, Δ c H o liquid –1236.4 kJ/mol Heat capacity, c p: 129.0 J/(mol K) Gas properties Std enthalpy change of formation, Δ f H o gas –125.4 kJ/mol Standard molar entropy, S o ...
of formation, Δ f H o solid? kJ/mol Standard molar entropy, S o solid? J/(mol K) Heat capacity, c p? J/(mol K) Liquid properties Std enthalpy change of formation, Δ f H o liquid? kJ/mol Standard molar entropy, S o liquid: 250.54 J/(mol K) Heat capacity, c p: 131.29 J/(mol K) Gas properties Std enthalpy change of formation, Δ f H o gas-1343. ...