WorksheetsUnit 1 Test Review
Total questions: 30
Worksheet time: 35mins
The curve of the liquid in a graduated cylinder is the
Mass
Meniscus
Density
Weight
8.7: Combustion is when a __________ reacts with oxygen
petrol
fuel
fire triangle
carbon dioxide
Three things that are needed for combustion are:
oxygen, nitrogen and carbon dioxide
fuel, oxygen and carbon dioxide
fuel, spark, and oxygen
fuel, heat and carbon dioxide
What does a fuel need in order to burn?
fuel
electricity
oxygen
hydrogen
In a chemical equation, the starting chemicals are called...
reactants
products
ingredients
The combustion of hydrocarbons produces which of these 2 things:
nitrogen and carbon dioxide
water and hydrogen
nitrogen and hydrogen
water and carbon dioxide
For the formula:
Q= m c ∆T
The units for specific heat are:
g /cal °C
°C/g cal
Cal/g
cal/g°C
A reaction is performed in a beaker with a temperature probe recording the temperature changes in the water surrounding the reactants. If the temperature of the surrounding water began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius. Is the reaction endothermic or exothermic?
Exothermic
Endothermic
What does "q" mean?
A change in health
A change in heat energy
A change in height
A change in temperature
What does "ΔT" mean?
A change in health
A change in heat energy
A change in height
A change in temperature
The process of cooling down a liquid is exothermic.
True
False
What does temperature measure?
Heat
ºC
Average Kinetic Energy
Thermal Energy
Water has a specific heat of 1.00 cal/gºC. Wood has a specific heat of 0.421 cal/gºC. What material needs more energy to raise the temperature 1ºC?
Wood
Water
Both are the same
Equal masses of copper, iron, brass, and steel were all heated with 1000 calories of energy. What material would experience the smallest temperature change?
copper
iron
brass
steel
Which of these DOES NOT account for the large difference seen in our lab cheeto value compared to the Nutrition Facts Cheeto value (cal/g)?
errors in measurement
not all of the energy went into the water
the energy released by the cheeto went in all directions
water is a poor choice for measuring temperature change
Which of the following items does not contribute to the amount of calories in food?
Vitamins
Protein
Carbohydrates
Fat
True or False: Protein, Carbs, and Fat have the same amount of calories per gram. (Inspect the food label)
True
False
This graphs shows that
As time increases, the amount of rain increases
As the amount of rain decreases, the number of hours increases.
Time has an indirect relationship with rain
Time is not a function of amount of rain fall.
Another appropriate title for this graph could be:
Rain (cm) vs Time (hours)
Time (hours) vs Rain (cm)
Time as a function of Rain
None of these are correct
A sample of iron receives 12 cal of heat energy that raises the temperature of the iron by 25.0°C. If iron has a specific heat of 0.024 cal/g°C, what is the mass of the iron sample? (show your work)
25g
30g
20g
50g
The specific heat of water is 1.00 cal/g°C.
If 235 cal of energy is added to 6.20 g of water, what should the expected temperature change be?
37.9 °C
1460 °C
0.0264 °C
18.0 °C
If the specific heat of water is 1.00 cal/g∙°C, how much heat is required to increase the temperature of 1200 g of water from 23 °C to 39 °C? (show your work)
-19200 cal
19200 cal
27600 cal
-46800 cal
