Please help me set up these problems. I have been staring at them for hours and I can't tell where I went wrong.
Question: Consider the following reaction: CaCO3(s)→CaO(s)+CO2(g).
Estimate ΔG∘ for this reaction at each of the following temperatures. (Assume that ΔH∘ and ΔS∘ do not change too much within the given temperature range.)
A.) at 320K
B.) at 1100K
If you will type in your work I will find the error.
You should be using
dGrxn = (n*dGf products) - (n*dGf reactants)
@DrBob222 thank you!
To estimate ΔG∘ for the given reaction at each temperature, we need to use the equation:
ΔG∘ = ΔH∘ - TΔS∘
where ΔH∘ is the standard enthalpy change, ΔS∘ is the standard entropy change, and T is the temperature in Kelvin.
To solve the problems, we need to follow these steps:
Step 1: Obtain the values of ΔH∘ and ΔS∘ for the given reaction. These values can be found in reference sources or given in the question.
Step 2: Convert the temperatures from Celsius to Kelvin by adding 273 to the given temperatures.
Step 3: Use the ΔG∘ equation to calculate ΔG∘ at each temperature.
Let's apply these steps to solve the problem:
A.) At 320K
Step 1: Look up the values of ΔH∘ and ΔS∘ for the reaction CaCO3(s)→CaO(s)+CO2(g).
Step 2: Convert 320°C to Kelvin: 320 + 273 = 593K.
Step 3: Substitute the values into the equation: ΔG∘ = ΔH∘ - TΔS∘.
ΔG∘ = (ΔH∘ at 320K) - 593 * (ΔS∘ at 320K).
B.) At 1100K
Step 1: Look up the values of ΔH∘ and ΔS∘ for the reaction CaCO3(s)→CaO(s)+CO2(g).
Step 2: Convert 1100°C to Kelvin: 1100 + 273 = 1373K.
Step 3: Substitute the values into the equation: ΔG∘ = ΔH∘ - TΔS∘.
ΔG∘ = (ΔH∘ at 1100K) - 1373 * (ΔS∘ at 1100K).
By following these steps, you should be able to calculate ΔG∘ for the given reaction at each temperature. Remember to use the appropriate values for ΔH∘ and ΔS∘ at each temperature.