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Engineering, 22.02.2020 05:43 dragon2565
For each of the following cases choose a suitable system, if possible, and describe its boundaries and surroundings. Indicate if the work done (Wk) is positive, negative, or zero, and heat transfer (Q), if any, positive, negative or zero.
A balloon is inflated by means of a hand pump. Assume that the balloon, pump, and connectors are adiabatic.
A liquid moving inside a rigid vessel comes slowly to rest.
Hydrogen (H2) and oxygen (O2) in a rigid vessel undergo a chemical reaction and water is formed.
A pressure cooker containing water is put on a stove and the pressure inside rises.
An electric capacitor is connected to a battery.
The voltage across the capacitor is rising.
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