Assume that you have a sample of gas at 350 K in a sealed container, as represented in (a). Which of the drawings (b)–(d) represents the gas after the temperature is lowered from 350 K to 150 K? The boiling point of the gas is 90 K.

Video transcript

Hello everyone today. We have the following problem compound a is contained in a container as a gas at 300 Kelvin Identents the drawing that represents a when the temperature is decreased to Kelvin, The melting and boiling points of A. Kelvin and 190 Kelvin respectively. So first it's important to recognize some principles. So for a general compound, the overall temperature is going to be greater that we have here Than our boiling point. So the temperature that we have are 300° Kelvin is greater than our Boiling Point which is 1 90 Kelvin. And so this is representative of a gas in the situation, if the temperature is between the boiling point and the melting point, this would be considered a liquid. And if our temperature is less than our melting point, this is going to be known as a solid. So we see here that our gas that we have That was decreased to 210° Kelvin, This is going to be greater than our boiling point which is 90 Kelvin. And so with that principle where temperature is greater than our boiling point, this is going to be a gas. So this sample is going to remain as a gas and the answer choice that best represents this is Andrew choice C as the particles are all spread out and are representative of a gas overall, I hope this helped until next time