Question

which phase of matter has the strongest attractions among particles? gases solids liquids 7 formula 1 point a gas container is initially at 956.9 mm hg and 171.1 k. what will the pressure be, in mmhg, when the container warms up to a temperature of 25.5 °c? round your answer to 1 decimal place. answer 8 multiple choice 1 point which of these describes kinetic molecular theory? the temperature is directly related to the volume of the container. particles are negligibly small compared to the volume of the container. energy is lost when particles collide. gas particles are strongly attracted to one another.

Explanation:

Step1: Recall particle - phase relationships

Solids have the strongest particle - particle attractions. In solids, particles are closely packed and have limited movement. Gases have the weakest attractions as particles are far apart and move freely. Liquids have intermediate attractions.

Step1: Convert the final temperature to Kelvin

The final temperature $T_2=25.5^{\circ}C$. To convert to Kelvin, use the formula $T(K)=T(^{\circ}C)+ 273.15$. So $T_2=25.5 + 273.15=298.65$ K. The initial pressure $P_1 = 956.9$ mmHg and initial temperature $T_1=171.1$ K.

Step2: Apply Gay - Lussac's Law

Gay - Lussac's Law is $\frac{P_1}{T_1}=\frac{P_2}{T_2}$. Rearranging for $P_2$ gives $P_2=\frac{P_1T_2}{T_1}$.
Substitute the values: $P_2=\frac{956.9\times298.65}{171.1}$.
$P_2=\frac{956.9\times298.65}{171.1}=\frac{285988.185}{171.1}\approx1671.5$ mmHg.

Step1: Recall Kinetic Molecular Theory

One of the postulates of the Kinetic Molecular Theory is that particles are negligibly small compared to the volume of the container. Temperature is related to the average kinetic energy of the particles (not directly to volume as in option 1). Collisions between particles are elastic (no energy is lost, so option 3 is wrong), and gas particles have weak or negligible attractions to one another (option 4 is wrong).

Answer:

Solids