Definitions
What is the term for energy stored to be used at a later time?
Potential energy
Is aluminum foil an example of a pure substance or mixture?
Pure substance
Is ice freezing in the freezer a chemical or physical change?
Physical
The temperature is 19℃. What is the temperature in Kelvin?
292 K
When 9.02 g of ice drops in temperature from 5.0 °C to -3.0 °C, how much heat energy is released? (c of ice = 2.06 J/g°C)
-148.65 J
What is the term for a pure substance that contains only one type of material, like copper?
Element
Is a rug an example of kinetic or potential energy?
Potential
Is hammering copper into sheets a physical or chemical change?
Physical
The temperature is -35℃. What is the temperature in Fahrenheit?
-31℉
A 54.2 g sample of iron has an initial temperature of 19.2℃. What will the final temperature of the sample be after 76.1 J of heat is added? The specific heat of iron is 0.449 J/g℃.
22.33℃
What characteristics are observed or measured without changing the identity of the substance?
Physical properties
Is a pile of salt and pepper a heterogenous or homogenous mixture?
Heterogenous
Is silver tarnishing a chemical or physical change?
Chemical
How many calories are obtained from a pat of butter if it provides 63 J of energy when metabolized? 1 calorie = 4.184 J
15.06 cal
What is the specific heat of a metal if 14.8 g absorbs 271 J of energy and the temperature rises from 20.2℃ to 26.5℃?
2.91 J/g℃
A uniform mixture; cannot see parts
Homogenous mixture
Is vinegar a heterogenous or homogenous mixture?
Homogenous
Is ice cream melting a change of shape or change of state?
State
A food item contains 15 g of carbohydrates, 15 g of fat, and 12 g of protein. How many kcal does the food item contain?
Carbs: 4 kcal / 1 g
Fat: 9 kcal / 1 g
Protein: 4 kcal / 1 g
243 kcal
A layer of copper on a pan has a mass of 35 g. How much heat, in Joules, will raise the temperature of the copper from 26℃ to 320℃ if the specific heat of copper is 0.385 J/g℃?
3961.65 J
What is a physical composition of 2 or more substances in varying proportion?
Mixture
Is raking leaves an example of kinetic or potential energy?
Kinetic
Is cutting paper up a change of state or change of shape?
Shape
The temperature is 54.6℃. What is the temperature in ℉?
130.28℉
A 60.0 g sample of tin is heated to 67.8℃ and dropped into 35.0 g of water at 12.6℃. If the final temperature is 32.8℃, what is the specific heat of tin? The specific heat of water is 4.184 J/g℃.
1.409 J/g℃