Chemestry chapter 3
fist exam study
Terms in this set (38)
What is the value of 27°C on the Fahrenheit temperature scale?
When methane is burned with oxygen the products are carbon dioxide and water. If you produce 36 grams of water and 44 grams of carbon dioxide from 16 grams of methane, how many grams of oxygen were needed for the reaction?
How many calories are there in a 255 Calorie snack bar?
2.55 × 105
When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 9 grams of water and 11 grams of carbon dioxide from 16 grams of oxygen, how many grams of methane were needed for the reaction?
What is the value of 27°C on the Kelvin temperature scale?
A pure substance is:
composed of only one type of atom or molecule
Which type of energy is associated with motion?
Which of the following items is a chemical property?
the tarnishing of a copper statue
Which of the following is a homogeneous mixture?
What is the value of 98 °F in units of °C?
If a solid piece of shiny sodium metal is exposed to chlorine gas, a large amount of heat is released and the white solid sodium chloride (table salt) forms. Based on this information, which of the following statements is TRUE?
This process was exothermic.
If you hold a solid piece of pure gallium metal in your hand, your body heat will melt the gallium into its liquid form. This illustrates which of the following?
How much heat (kJ) is needed to raise the temperature of 100.0 grams of water from 25.0°C to ?
Which of the following items is a pure substance?
A solid form of matter in which there is long range repeating order is called ________.
How many joules are there in a 255 calorie snack bar?
1.07 × 103
If a particular process is endothermic, the reverse process must be a (an)
Physical properties are:
those that a substance displays without changing its composition.
Which of the following items is a mixture?
When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 18 grams of water from 8 grams of methane and 32 grams of oxygen, how many grams of carbon dioxide were produced in the reaction?
Which of the following items is a physical property?
the odor of spearmint gum
In order, what is the freezing point, room temperature and boiling point of water according to the Fahrenheit scale?
A solution is an example of a (an)
Which state of matter has atomic spacing that is close together and indefinite shape?
When 49.5 J of heat was transferred to 7.3 g iron at 22°C, the temperature of iron increases to 37°C. What is the specific heat of iron in J/g∙°C?
Consider the following specific heats of metals.
Metal Specific Heat (J/g∙°C)
If the same amount of heat is added to 50.0 g samples of each of the metals, which are all at the same temperature, which metal will reach the highest temperature?
Which state of matter has atomic spacing that is close together and definite shape?
Which type of energy is associated with position?
How many kilojoules are there in 95.0 Calories?
A 15.0 gram lead ball at 25.0°C was heated with 40.5 joules of heat. Given the specific heat of lead is 0.128 J/g∙°C, what is the final temperature of the lead?
Which state of matter has indefinite shape and is compressible?
In order, what is the freezing point, room temperature and boiling point of water according to the Celsius scale?
An energy diagram that shows the reactants having greater energy than the products illustrates an
Melting point can be defined as the temperature when a solid becomes a liquid. The melting point of the chemical acetone is -95°C. Which state of matter would you expect to exist for acetone at a temperature of -94°C?
Which statement below best describes the process of the paint on a vehicle fading over time?
Chemical change because the paint molecules are changing composition.
What is the value of 335 K on the Celsius temperature scale?
What type of energy is associated with the burning of gasoline?
Which of the following is a heterogenous mixture?