Gases questions | form five Chemistry

Define the following:

1. Molar volume of a gas at stp.
2. Dalton`s law of partial pressures.

Answer / Solution

UNSOLVED

Two gas burettes, one containing 10cm³ of sulphur dioxide (SO₂) and the other containing 30cm³ of hydrogen sulphide (H₂S) both at 1 atmosphere and at 0^oC are initially separated by a stop cork. The stop cork is then opened and the two gases are allowed to mix according to the reaction SO_2(g) + 2H₂S_(g) →3S_(s) + 2H₂O_(l). Calculate the final pressure (in atmospheres) after the reaction has ended and the apparatus has gained its temperature of 0^oC. (Assume liquid water does not exert pressure).

Answer / Solution

UNSOLVED

A 0.25 moles of air has entered a diesel engine at a pressure of 1.05x10⁵ Pa and a temperature of 27^oC. Assuming that air is ideal, calculate:

1. the volume it occupies.
2. its temperature, immediately after compression to one twentieth of its original volume where the pressure rises to 7.0 x 10⁶​ Pa.

Answer / Solution

UNSOLVED

A 42g of nitrogen gas and 8g of hydrogen gas are mixed in a 10 litre vessel at 20^oC. Calculate the partial pressure of each gas and the total pressure of the gas mixture.

Answer / Solution

UNSOLVED