Question 14
Gas Laws50cm3 of hydrogen are sparked with 20cm3 of oxygen at 100°C and 1 atmosphere. The total volume of the residual gases in
- A.50 cm3
- B.10cm3
- C.40cm3
- D.30cm3
- E.70 cm3.
Show the answer and explanation
Answer: A (50 cm3)
Explanation
2H2 + O2 → 2H2O. 20 cm3 O2 uses 40 cm3 H2 and gives 40 cm3 steam (a gas at 100°C). Left: 10 cm3 H2 + 40 cm3 steam = 50 cm3.