Clean air and the air in the laboratory

Assignment Help Other Subject

Reference no: EM13177929

A gas leak has led to the presence of 1.00 mole% carbon monoxide in a 350-m3 laboratory. The leak was discovered and sealed, and the laboratory is to be purged with clean air to a point at which the air contains less than 35 ppm (molar basis). Assume that the clean air and the air in the laboratory are at the same temperature and pressure and that the laboratory air is perfectly mixed throughout the purging process.

a) Let t(h) be the time required for the specified reduction in the carbon monoxide concentration. Write a differential CO mole balance, letting N equal the total moles of gas in the room (assume constant), x the mole fraction of CO in the room air, and Vp the flow rate of purge air entering and exiting the room. Convert the balance into an equation for dx/dt and provide an initial condition.

b) Integrate the balance to derive an equation for t in terms of Vp

c) If the volumetric flow rate is 700m3/hr (representing a turnover of two room volumes per hour), how long will the purge take? What would the volumetric flow rate have to be to cut the purge time in half?

d) Give several reasons why it might not be safe to resume work in the laboratory after the calculated purge time has elapsed? What precautionary steps would you advise taking at this point?

Reference no: EM13177929

Questions Cloud

What types of hardware-network and software architecture : Discuss the implication of the anytime ,anywhere,requirement for the application deployment environment. what types of hardware,network and software architecture will be required to fulfill that requirement

Studying cultures differnt than their own : What reasons do 3 of the authors of the assigned texts give for studying cultures differnt than their own? What occur to you as other reasons for living with, writing and teaching about people like the Bushmen or the Pygmies?

Culture and social structures : "Culture and social structures are basic core concepts in sociology. Discuss each along with the connections between culture and structure. Discuss, too, the following: a) the importance of each to human life and to our livelihood;

Determine convective heat loss per unit length of tube : A 1 cm diameter horizontal tube is located transverse to a flow of flluid(water) in a wide duct. the outer wall of the tube is maintained at 320k and the fluid temperature is 300k

Clean air and the air in the laboratory : Assume that the clean air and the air in the laboratory are at the same temperature and pressure and that the laboratory air is perfectly mixed throughout the purging process.

Identify an important managerial challenge : Identify an important managerial challenge facing your work organization (or family) and decide how to address it.

Civil service laws-rules and regulations : This agency administers civil service laws, rules, and regulations

Merit systems protection board : The Merit Systems Protection Board is

Different types of buyers and consumers : What are the different types of buyers and consumers? How does the type of buyer or consumer affect marketing strategy? As part of your response, consider the characteristics of buyers and the factors that influence their purchasing decision.

User Account

All Pages