Review Questions Unit 12 What will happen to the pressure of a contained gas if its temperature is lowered? Why is it important not to puncture an aerosol.

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Presentation transcript:

Review Questions Unit 12 What will happen to the pressure of a contained gas if its temperature is lowered? Why is it important not to puncture an aerosol can? Explain why an unopened bag of potato chips left in a hot car appears to become larger. If two variables have an inverse relationship, what happens to the value of one as the value of the other increases? If two variables have a direct relationship, what happens to the value of one as the value of the other is increased? What four variables are used to describe gases?

Review Questions Unit 12 Label the following examples as being generally representative of direct or inverse relationship. Popularity of a musical group vs. how hard it is to get tickets for its concert Number of carats a diamond weighs vs. its cost Number of people helping vs. how long it takes to clean up after a party Label the following examples as being representative of a direct or inverse relationship. Pressure versus volume of a gas Volume versus temperature of a gas Pressure versus temperature of a gas

Review Questions Unit 12 List the standard conditions for gas measurements. Write the equation for the Combined Gas Law. Identify the units most commonly used with each variable. State Avogadro’s Law. What volume is occupied by one mole of a gas at STP? What volume do two moles occupy at STP? What units must be used to express the temperature in the gas laws’ equations? Write the value and units for the gas constant R in two common forms.