Chemistry Forums for Students > High School Chemistry Forum
Physical Chemsitry
AWK:
The efficiency of heating devices is never 100%. The newest coal-fired power plant has an efficiency of 45%.
kahynickel:
thanks for prompt answer.
Borek:
--- Quote from: kahynickel on May 19, 2019, 03:49:18 AM ---but why it wrote butane was completely burnt ??
--- End quote ---
Because it was, and the amount of heat was exactly the one calculated. It was the heat transfer to water that wasn't complete - some of the heat was dispersed, heating surroundings.
kahynickel:
When a sample of a gas is compressed at constant temperature from 1500 kPa to 6000 kPa, its volume changes from 76.0 cm3 to 20.5 cm3.
Which statements are possible explanations for this behaviour?
1 The gas behaves non-ideally.
2 The gas partially liquefies.
3 Gas is adsorbed on to the vessel walls.
using P1V1=P2V2; 1500x76.0 = 6000xP2
P2 = 19cm3....but the volume is 20.5 cm3 more than predicted. so the gas has slightly more volume means ideal behaviour
2 and 3 can't understand ..
AWK:
What volume could be 1 mole of gas if condensed? Compare this to your data
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