1. 100 kmols of moist hydrogen gas containing 4% water by mole is burnt completely in a furnace with 32% excess dry air.
a) Complete analysis
b) Orsat analysis
2. A furnace is charged with 100 kmols of fuel gas, the composition of which is: 50% CO, 30% H2, 5% CH4, 5% C2H6 and 10% O2. Dry air is supplied 50% in excess for combustion. Assuming complete combustion.
a) Complete analysis
b) Orsat analysis
Answers & Comments
**Problem 1:**
a) **Complete Analysis:** To find the composition of the products when hydrogen gas is burned with excess dry air, you'll want to balance the chemical reaction first. Given the 4% water content in the hydrogen, you'll also need to account for the formation of water in the combustion process. Then, calculate the moles of each product, considering the given excess air.
b) **Orsat Analysis:** The Orsat analysis is used to measure the composition of a gas mixture. You would typically pass a known volume of the gas through an Orsat apparatus containing reagents that selectively react with specific components (like CO2 absorbent for carbon dioxide). By measuring the change in volume of the reagents, you can determine the composition of the gas.
**Problem 2:**
a) **Complete Analysis:** Similar to problem 1, you'd first balance the chemical reaction for the complete combustion of the fuel gas with excess dry air. Then, calculate the moles of each product formed in the reaction.
b) **Orsat Analysis:** As in the previous problem, an Orsat analysis can be used to determine the composition of the gas mixture, including the percentages of CO, H2, CH4, C2H6, and O2.
In both cases, you'd need to provide more specific information, such as the chemical reactions and any given conditions, to perform detailed calculations. Additionally, you may need to use data such as molar masses, stoichiometry, and ideal gas laws to find the answers.