Chemistry - Thermochemistry Question with Solution | TestHub
An intimate mixture of carbon monoxide gas and the theoretical amount of air at 27°C and a total pressure of 1 atm, is exposed in a closed rigid vessel. If the process occurs under adiabatic condition, then using the following data, answer the following questions. Take R = 2 cal/K-mol and 27°C = 300 K.
Given: (i) CP,m(N2) = 7.0 cal/K-mol (ii) CP,m(CO2) = 9.5 cal/K-mol (iii) CO(g) + 1/2O2(g) → CO2(g), ΔH = -34.0 kcal, independent of temperature (iv) Air contains 20% O2 and 80% N2 by volume
What will be the final pressure (approximately)?
Options:
Answer:
Solution:
At constant volume, pressure is proportional to the product of the number of moles and temperature, i.e., P ∝ nT.
The final pressure, Pf, can be calculated as:
Pf = 1 × 3 × 2226/3.5 × 300 = 6678/1050 = 6.36 atm
This corresponds to option (b).
