You are going to study the thermodynamics of a redox reaction. You have two beak

Question

You are going to study the thermodynamics of a redox reaction. You have two beakers: one with an aqueous solution of the oxidizing agent and the other with an aqueous solution of the reducing agent. You plan to mix the contents of the two beakers in an Erlenmeyer flask with a magnetic stirrer in it. The stirrer will start operating as soon as the reagents are mixed. At the same time, the flask will be heated to approximately 80°C by a hot plate. The reaction is carried out in a hood. Define the boundaries of the system and list what is part of the system. Give reasons for your choice of boundaries. 1. 2. Classify each of the following as an isolated, an open or a closed system a) A stoppered flask containing a solution. b) A picnic cooler. For each of the following systems, decide whether energy work is being done on or by the system. The system is underlined. a) A spring being compressed. b) A balloon expanding 3. 4. Define the concepts of work in terms of molecular motion. What is the advantage of considering each of the following in calculating the work done by an expanding gas? a) a frictionless piston b) a rigid piston 5.

Explanation / Answer

2. a stoppered flask containing a solution is a closed system

a picnic cooler is an isolated system as heat and matter cannot be exchanged

3. a spring being compressed : work is done on the system

a balloon expanding :work is done by the balloon

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