Final answer:
The density of camphor is less at 80 degrees Celsius and 12 Torr when compared to 25 degrees Celsius and 1 atm because higher temperatures and lower pressures generally lead to lower densities.
Step-by-step explanation:
The density of a substance is dependent on its temperature and pressure. In the question, you are comparing the density of camphor at two different sets of temperature and pressure. At 80 degrees Celsius and 12 Torr, the camphor is at a higher temperature and a significantly lower pressure than at 25 degrees Celsius and 1 atm.
Generally, increasing temperature decreases density because substances tend to expand when heated. Meanwhile, decreasing pressure also leads to a decrease in density, as molecules have more space to move around.
So, under the conditions of 80 degrees Celsius and 12 Torr, camphor would have a lower density compared to at 25 degrees Celsius and 1 atm. Therefore, the answer to the student's question is (b) Less than at 25 degrees Celsius and 1 atm.
The answer to the question is option b) Less than at 25 degrees Celsius and 1 atm. At 80 degrees Celsius and 12 Torr, the density of camphor will be less than at 25 degrees Celsius and 1 atm. This is because as the temperature increases, the volume of a gas increases, leading to a decrease in density. Additionally, as the pressure decreases, the volume of a gas increases, further contributing to a decrease in density.