Lab: Charles's Law — Unit test Answers

A cylinder at left with balls in a layer on the bottom of the cylinder has an arrow leading to a cylinder at right with balls stacked near the bottom of the cylinder.

Which state(s) of matter have no definite shape or volume?

Which example illustrates a chemical change?

Marco wants to investigate the chemical properties of sodium bicarbonate, or baking soda. He plans to carry out the tests below.Test 1: Mix a teaspoon of sodium bicarbonate into a cup of warm water to see if it dissolves.Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes.Test 3: Heat a teaspoon of sodium bicarbonate in the oven to see if its melting point is less than 400 degrees Fahrenheit.

Four students are analyzing four different substances and recording their findings in this table.Which most describes this table?

The volume of a gas increases from 18.7 m3 to 25.1 m3 while the pressure changes from 1.82 atm to 1.41 atm. If the initial temperature is 353 K, what is the final temperature of the gas?

Which formula represents Charles’s law?

What is conserved in physical changes?

Which property of physical changes explains why matter is conserved in a physical change?

A gas has an initial volume of 2.5 L at a temperature of 275 K and a pressure of 2.1 atm. The pressure of the gas increases to 2.7 atm, and the temperature of the gas increases to 298 K.

Ella makes this table to organize her notes on whether atoms gain or lose energy during the changes of state.

Ricardo finds an online site about the gas laws. The site shows the equation below for Charles’s law.

During which changes of state do atoms that cannot move past one another become free to move?

The atoms in a sample are close together but can slide past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.