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☆☆☆☆☆Cards in this guide (4)
A mole is objects
6.022x10^23
It doesn't seem right but it is, i missed the question because i didn't put this.
At 25oC three moles of a gas occupy a volume of 4.0 L at 1.9 kPa If the volume decreases to 2.0 L what will the new pressure be
3.8 kPa
Which of the four thermal processes describes the pressure volume relationship at a constant temperature
Boyle's Law
PV=K or P1V1=P2V2
If the boats engine has a heat input of 40000 J with 30000 J exhausted into the surroundings the heat sink what is its efficiency
efficiency = output/input
therefore, in above case it is 3/4= 0.75
or 75%.
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