Exam 7: Changes of State and Gas Laws

Formaldehyde, commonly used to preserve biological specimens, is shown in the structure below.If liquid formaldehyde is boiled, which of the following illustrations BEST depicts how formaldehyde looks in the resulting vapor?

Which atom has the highest electronegativity in this molecule of acetone?

Does isopropyl alcohol have a higher or lower boiling point than acetone?

How does the pressure of a gas change when it is heated in a sealed container with a constant volume? (Note: It is not a good idea to actually do this without special equipment)

Which arrow BEST shows the molecular dipole of acetone?

The temperature of a gas at 1.00 atm and 8.00 °C is increased to 20.0 °C, resulting in a change of pressure.Which equation would you use to calculate the new pressure?

The atmospheric pressure in Denver is 0.85 atm.What is the atmospheric pressure in torr?

Which of the following statements about pressure is FALSE?

In which of the following phase changes is energy transferred to a substance?

Which of the following changes of state is correctly named?

A liquid has temperature A as shown on the heating curve.What will happen to the temperature of the liquid if heat is added to it?

In general, which is the BEST interpretation of specific heat?

How does the pressure of a gas change when it is compressed?

Two sealed boxes are filled with gas.The first box contains more molecules moving faster and therefore has a higher pressure.The second box contains fewer molecules moving slower and therefore has a lower pressure.Why does the first box have a higher pressure?

Which of the following circumstances does NOT cause decompression sickness?

Arrow A points to

What is the molecular geometry of the carbon indicated by the arrow in this molecule of acetone?

You have a 25-g sample of a metal and you would like to identify it.You are certain that the metal is either copper (specific heat = 0.093 cal/g·°C), lead (specific heat = 0.031 cal/g·°C), or aluminum (specific heat = 0.22 cal/g·°C).You run an experiment in which you find that the metal absorbs 6.2 calories of heat when it increases in temperature from 25 °C to 33 °C.Which metal is it?

Which tends to be larger for a substance: the heat of vaporization or the heat of fusion?

An oxygen tank has a pressure of 12 atm at 295 K.The maximum pressure that the tank can hold is 25 atm.What is the maximum temperature at which the tank can be stored?