Calculate Work of Expansion in Chemical Reaction | 100 cm2 Container

In summary, the equation for calculating work of expansion in a chemical reaction is W = -PΔV, with W representing work, P representing pressure, and ΔV representing change in volume. The unit of measurement for work of expansion is joules (J). The pressure in a chemical reaction can be determined by using a pressure gauge or by measuring the force exerted on the walls of the container. Yes, the work of expansion can be negative if the pressure and volume of the system decrease. The surface area of the container does not directly affect the work of expansion, but it can indirectly impact the pressure and volume of the system, leading to changes in the work of expansion.
  • #1
tweety1234
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Homework Statement



A chemical reaction takes place in a container of cross-sectional area 100 cm2. The container has a loosely fitting piston at one end. As a result of the reaction, then piston is pushed out by 10 cm against an external pressure of 101.3 kPa. Calculate the work of expansion done by the system.

I really don't know what equation to be using?
 
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  • #2
is it

[tex] W = \int^v_v p dv [/tex]
 
  • #3
Yes, that's the one. Except the limits should probably be "V1" and "V2".
 

1. What is the equation for calculating work of expansion in a chemical reaction?

The equation for calculating work of expansion is W = -PΔV, where W represents work, P represents pressure, and ΔV represents change in volume.

2. What is the unit of measurement for work of expansion?

The unit of measurement for work of expansion is joules (J).

3. How do you determine the pressure in a chemical reaction?

The pressure in a chemical reaction can be determined by using a pressure gauge or by measuring the force exerted on the walls of the container the reaction is taking place in.

4. Can the work of expansion in a chemical reaction be negative?

Yes, the work of expansion can be negative if the pressure and volume of the system decrease, indicating that the system is doing work on its surroundings.

5. How does the surface area of the container affect the work of expansion in a chemical reaction?

The surface area of the container does not directly affect the work of expansion in a chemical reaction. However, it can indirectly impact the pressure and volume of the system, which in turn will affect the work of expansion.

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