10 dmĀ³ of a gas at 400 K is brought to 500 K at constant pressure. What is the new volume?
Answer and explanation
Correct answer: D. 12.5 dmĀ³
- Step 1: Charles's law: Vā/Tā = Vā/Tā (T in kelvin). Step 2. Vā = 10 Ć 500 Ć· 400 = 12.5 dmĀ³. Answer: 12.5 dmĀ³. Why not the others: 8 dmĀ³ is what you get if you invert the temperature ratio. 2.5 dmĀ³ is what you get if you give only the size of the change in volume. 10 dmĀ³ is what you get if you assume the volume stays constant.
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