2 dmĀ³ of a gas at 200 K is brought to 150 K at constant pressure. What is the new volume?
Answer and explanation
Correct answer: A. 1.5 dmĀ³
- Step 1: Charles's law: Vā/Tā = Vā/Tā (T in kelvin). Step 2. Vā = 2 Ć 150 Ć· 200 = 1.5 dmĀ³. Answer: 1.5 dmĀ³. Why not the others: 2.667 dmĀ³ is what you get if you invert the temperature ratio. 0.5 dmĀ³ is what you get if you give only the size of the change in volume. 2 dmĀ³ is what you get if you assume the volume stays constant.
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