What is the absolute entropy of 3.1 mol of gaseous ammonia at 1.8 bar and 298 K?
To find the absolute entropy of gaseous ammonia, we can use the standard molar entropy values provided in reference tables. The standard molar entropy (S°) of a substance represents the absolute entropy of one mole of the substance at standard conditions (1 bar and 298 K).
In this case, we have 3.1 mol of gaseous ammonia. We need to calculate the entropy for this quantity.
The equation we will use is:
ΔS = n × ΔS°
Where:
ΔS is the absolute entropy change
n is the number of moles
ΔS° is the standard molar entropy
First, we need to find the standard molar entropy value for ammonia (NH3) in reference tables. The standard molar entropy of ammonia (NH3) is given as 192.77 J/(mol·K).
Plugging in the values:
ΔS = 3.1 mol × 192.77 J/(mol·K)
Calculating this will give you the absolute entropy change for 3.1 mol of gaseous ammonia at 1.8 bar and 298 K.