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WorksheetsKimia Fisika
Total questions: 10
Worksheet time: 18mins
Gases behave non-ideally under which of the following conditions?
At low pressure and low temperature
At high pressure and low temperature
Near the boiling point of water
Ideal gases can never exhibit non-ideal behaviour
At constant volume which graph shows the relationship between the pressure and temperature?
Each of the flasks shown have different volumes (they are different sizes) but the temperature of each flask is the same. In which flask will the pressure be the highest?
Flask 1
Flask 2
Flask 3
Flask 4
Two vessels connected by a valve of negligible volume. One container (I) has 2.8 g of N2 at temperature T1(K). The other container (II) is completely evacuated. The container (I) is heated to T2(K), while container (II) is maintained at T2/3(K). Volume of vessel (I) is half of that of vessel (II). If the valve is opened, then what is the weight ratio of N in both vessels(wI /wII)?
1/6
1/8
3
6
How many liters of hydrogen, measured at STP, are needed to combine exactly with 1.50 L of nitrogen, also measured at STP, to form ammonia?
3 L
4,5 L
0,5 L
1,5 L
If the pressure is constant, the system is in mechanical equilibrium with its surroundings and no work is done other than work due to expansion and compression, which of the following are true :
ΔU =ΔQ and ΔW = -p ΔV
ΔH =ΔQ and ΔW = -p ΔV
ΔH =ΔQ - p ΔV and ΔW = -p ΔV
ΔU =ΔQ and ΔW = p ΔV
Which statement is true for carbon dioxide at -60 °C?
All three phases are possible.
It is a solid
It can exist as a solid or a gas, depending on pressure.
With enough pressure it can be melted.
The pressure is increased on a sample of water at 0 °C from 0 mmHg to 800 mmHg. In order, what changes occur?
deposition, freezing
sublimation, melting
condensation, freezing
deposition, melting
Determine the number of degrees of freedom for the following systems :
NH4Cl(s) < ---> NH3(g) + HCl(g)
1
2
3
0
The Carnot cycle consists of the following four processes, which statement is appropriate for stage 2?
the ideal gas in the system absorbs qin amount heat from a heat source at a high temperature Thigh , expands and does work on surroundings.
the system is thermally insulated. The gas continues to expand and do work on surroundings, which causes the system to cool to a lower temperature, Tlow
surroundings do work to the gas at Tlow , and causes a loss of heat, qout
the system is thermally insulated. Surroundings continue to do work to the gas, which causes the temperature to rise back to Thigh
