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Stoichiometry - Engineering

Q1:

Pick out the wrong statement.

A One kg-mole of an ideal gas occupies 22.4 m3 at N.T.P.

B One lb-mole of an ideal gas occupies 359 ft3 at N.T.P.

C One gm-mole of an ideal gas occupies 22.4 litres (i.e., 22400 c.c) at N.T.P.

D Density of dry air at N.T.P. is 1 gm/litre.

ANS:D - Density of dry air at N.T.P. is 1 gm/litre.

The wrong statement is: "One kg-mole of an ideal gas occupies 22.4 m3 at N.T.P." The correct statement is that one mole of an ideal gas occupies 22.4 liters (i.e., 22400 cc) at N.T.P. This is based on the molar volume of gases at standard temperature and pressure (STP). The molar volume of an ideal gas at STP is approximately 22.4 liters per mole. So, the given statement is incorrect because it incorrectly states "one kg-mole" instead of just "one mole."