General Knowledge - Chemistry - Discussion

Discussion Forum : Chemistry - Section 1 (Q.No. 7)
7.
The molecules of which gas have highest speed?
H2 at -73oC
CH4 at 300 K
N2 at 1,027oC
O2 at 0oC
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
83 comments Page 9 of 9.

SISAY ANTENEH said:   1 decade ago
Hydrogen gas is the right answer because it the lightest gas.

Bhawna said:   1 decade ago
Hydrogen is correct because it is lightest of all and hence can easily move.

Chemistry Nepal said:   1 decade ago
Its not like that.

The speed of gas is calculated by a relation.

Root Mean square velocity µ(rms) = (3RT/M).

From this relation we can calculate speed.

Only mass could not be taken into consideration here because temperature is specified.

So after calculation.

Speed of Hydrogen gas = 157380 unit.

Speed of Methane gas = 68385 unit.

Speed of Nitrogen gas = 142356 unit.

Speed of oxygen gas = 46128 unit.


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