Chapter 1 Flashcards
(20 cards)
What is matter?
Anything that has both mass and volume. The “stuff” of the universe.
What is a Physical Property?
A Property that a substance shows by itself without interacting with another substance. Ex: colour, melting point, boiling point, density.
What is a Chemical Property?
A Property that a substance shows as it interacts with, or transforms into, another substance. Ex: flammability, corrosiveness.
What is energy?
The ability to do work.
What is Potential Energy?
Energy due to the position of an object relative to other objects.
What is Kinetic Energy?
Energy due to the movement of an object.
What is Total Energy?
Total Energy = Potential Energy + Kinetic Energy
Are objects with lower energy states more stable or less stable?
More stable.
What is the formula for calculating density?
Density = Mass/Volume
What is Temperature (T)? What is the SI unit for measuring it?
Measures how cold or hot an object is relative to another.
The SI unit for temperature is Kelvin (K).
What is heat (q)?
The energy that flows from an object with higher T to object with a lower T.
What is 0 Kelvin in °C?
-273.15°C
What is an Extensive Property?
A property that is dependent on the amount of substance present. Ex: mass and volume.
What is an Intensive Property?
A property that is independent of the amount of substance. Ex: Temperature
Is heat (q) an intensive or extensive property?
Extensive.
How many significant digits are in the number 5300?
2
How many significant digits in the number 120.?
3
How many significant digits in the number 0.000135
3
Round these two numbers to 3 significant digits:
1. 82.75
2. 31.45
- 82.8
- 31.4
What is the difference between precision and accuracy?
Precision refers to how close the measurements in a series are to each other and Accuracy refers to how close a measurement is the actual value.
