0
How do you use the Gibbs free energy equation to find the Gibbs free energy change for the formation of ammonia at 25 degrees C?
Wiki User
∙ 7y ago
The Gibbs free energy change is calculated from the expression Δ G = Δ H - T(Δ S) For the formation of ammonia N2 + 3H2 --> 2 NH3 you need to find the enthalpy and entropy changes, which are Δ H (formation) = - 45.92 kJ/mol Δ S (formation) = - 98.39 J/mol/K Substituting into the first equation, remembering to divide the entropy value by 1000 because it's in J per mol per kelvin, not kJ, and converting the 25 degrees C to kelvin, we get: Δ G = -45.92 kJ http://www.docbrown.info/page07/delta3SGc.htm
Wiki User
∙ 7y ago
Add your answer:
Earn +20 pts
Can ammonia be broken down by chemical change?
The formula for the decomposition for ammonia would be 2NH3 --> N2 + 3H2
Change 245 K to degrees Celsius?
245K = -28.15ºCYou can use this equation to convert Kelvin to degrees Celsius: ºK - 273.15 = ºC
What is the equation for the standard enthalpy change of formation of isobutane?
im looking for the same question on Webassign. lol
What are indicators of a chemical change?
Things that can indicate a chemical change has occurred includeChange in colorRelease or absorption of energy (light, heat, etc.)Formation of gasFormation of precipitationIn chemical changes, the composition of the substance changes, and it is often difficult to reverse the process.
What identifies a chemical change has taken place?
Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.
Why can ammonia change a flower's color through a flower's pigment?
ammonia can change the soils pH (acidity level) which can affect the formation of plant pigments or the absorption of elements
Equation for the heat of formation of carbon disulphide?
C + 2S -> CS2 Enthalpy of formation is the change in enthalpy for the formation of a substance from its elements.
Can ammonia be broken down by chemical change?
The formula for the decomposition for ammonia would be 2NH3 --> N2 + 3H2
How do you change 180 degrees F to kelvin?
Use this equation to convert degrees Fahrenheit to Kelvin: [K] = ([°F] + 459.67) × 0.556
How do you change 180 degrees Fahrenheit to Kelvin?
Use this equation to convert degrees Fahrenheit to Kelvin: [K] = ([°F] + 459.67) × 0.556
Change 49 degrees to Fahrenheit to degrees celsius?
Use this equation to convert degrees Fahrenheit (ºF) to degrees Celsius/Centigrade (ºC): [°C] = ([°F] - 32) × 0.556
How do you change C to F degrees?
Use this equation to convert degrees Celsius/Centigrade (ºC) to degrees Fahrenheit (ºF): (ºC x 1.8) + 32 =ºF
Change 245 K to degrees Celsius?
245K = -28.15ºCYou can use this equation to convert Kelvin to degrees Celsius: ºK - 273.15 = ºC
What would you change 298 kelvin into degrees celsius?
Use this equation to convert Kelvin to degrees Celsius/Centigrade: [°C] = [K] - 273.15
What is the equation for the standard enthalpy change of formation of isobutane?
im looking for the same question on Webassign. lol
Why did you change from Fahrenheit to Celsius?
Use this equation to convert degrees Fahrenheit (ºF) to degrees Celsius/Centigrade (ºC): [°C] = ([°F] - 32) × 0.556
How do you change the temperature to Celsius?
Use this equation to convert degrees Fahrenheit (ºF) to degrees Celsius/Centigrade (ºC): (ºF - 32) / 1.8 = ºC
