At 300 kpa a substance boils at 70 degree C. the substance is observed to boil w
ID: 1022715 • Letter: A
Question
At 300 kpa a substance boils at 70 degree C. the substance is observed to boil when the pressure is increased to 600 kpa. At a pressure of 600 kpa, the substance will boil at: 140 degree C 35 degree C A temperature less than 70. degree C because for all compounds the boiling point decreases with increasing pressure. The same temperature (i.e., at 70 degree C) because for liquids the boiling point is independent of the pressure A temperature greater than 70 degree C because for all compounds the boiling point increases with increasing pressure A small beaker containing an acid solution which is 5% H_2SO_4 and 95% water is mixed with a solution in a large beaker which contains some H_2SO_4 and water. The resulting mixture is 11% H_2SO_4 and 89% water. What was the composition of the solution in the larger beaker before mixing occurred? Between 5 % and 11 % H_2SO_4 Impossible to say as there is insufficient information. Exactly 11 % H_2SO_4 Greater than 11 % H_2SO_4 Exactly 6% H_2SO_4 Which one of the following statements is true? A vapor is neither a liquid nor a gas, but is something between the two. A vapor is a mixture of a liquid and a gas. A vapor is a type of gas. A vapor is a type of liquid. A vapor is a dispersion of very fine liquid drops within another gas
Explanation / Answer
1).a temperature higher than 70 because when boiling temperature increases the pressure of substance increase.this is because when temperature increases the molecules move apart faster increasing pressure so molecules need an extra energy to keep the bonds as before. To do that increase boiling point which help to absorb energy.
2).this is impossible to say since the data is not enough. because although the %of initial amounts has been given, the volume of other has not given and also the amount of substance in the large beaker has not given. this volumes must be compaired with the amount present in molecules not in percentages.
3).vapour is a dispersion of very fine liquids drops within another gas.a faintly visible suspension of fine particles of gaseous substance.
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