Problem: The air bags that provide protection in autos in the event of an accident expand because of a rapid chemical reaction. The air bags give off heat when they expand.From the viewpoint of the chemical reactants as the system, what do you expect for the signs of q and w in this process?

FREE Expert Solution

For heat, q:

+ q → if the system gains, takes in, or absorbs heat or energy
– q → if the system loses, evolves, gives off, or releases heat or energy

For work, w:

+ w → work is done on the system by the surroundings (volume: compresses)
– w → work is done by the system on the surroundings (volume: expands)


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Problem Details

The air bags that provide protection in autos in the event of an accident expand because of a rapid chemical reaction. The air bags give off heat when they expand.

From the viewpoint of the chemical reactants as the system, what do you expect for the signs of q and w in this process?

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