1. boyle's law states that the volume of a gas is inversely proportional to its pressure if the?
A) temperature and number of particles are consistent**
B) temperature reaches absolute zero
C) number of particles are doubled
D) temperature and number of particles are doubled
2. which phase change is the reverse of condensation?
A) freezing
B) sublimation**
C) vaporization
D) melting
If number 2 is wrong I choose C.
To get the answer to question 1, you need to understand Boyle's Law, which states that the volume of a gas is inversely proportional to its pressure if the temperature and number of particles are consistent. In other words, if you keep the temperature and the number of particles of a gas constant, then when you decrease the pressure, the volume of the gas will increase, and vice versa. Therefore, the correct answer to question 1 is A) temperature and number of particles are consistent.
To get the answer to question 2, you need to know the different phase changes of matter. Condensation is the phase change from gas to liquid, where a gas loses heat and transitions into its liquid state. The reverse of condensation, where a substance goes directly from a solid to a gas without passing through the liquid phase, is called sublimation. Therefore, the correct answer to question 2 is B) sublimation.
You've correctly chosen the answer to question 2, so no need to change it.
1. Your answer is correct. Boyle's law states that the volume of a gas is inversely proportional to its pressure if the temperature and number of particles are consistent.
2. Your initial answer is incorrect. The phase change that is the reverse of condensation is vaporization. When a substance undergoes condensation, it changes from a gas phase to a liquid phase. Conversely, when a substance undergoes vaporization, it changes from a liquid phase to a gas phase.
#1 correct
#2C
dew condenses on the grass at night
it evaporates (vaporizes) in the sun during the say.
CO2 sublimes: goes from solid to vapor without a liquid phase. Hence, dry ice.