waec model questions vol1 2019 physics
Objective • Question 5
Question 5
WAEC_MODEL_QUESTIONS_VOL1
•
2019
A rigid container of volume 2.00 L initially contains 0.500 mol of an ideal gas at 27 °C. The gas is heated to 127 °C, after which an additional 0.200 mol of the same gas is introduced at the final temperature. Using $R = 0.0821\,\text{L·atm·mol}^{-1}\text{K}^{-1}$ and $1\,\text{atm}=101.3\,\text{kPa}$, determine the final pressure in the container (in kPa, rounded to the nearest whole number).
Answer Options
Correct Answer
A.
1164 kPa
B.
873 kPa
C.
831 kPa
D.
1150 kPa
Correct Answer
A
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