UNIT ONE Flashcards
Describe Heat
heat is thermal energy flowing from a higher temperature object to a lower temperature
What are the units that measure energy?
Calories, Kilocalories, Joules
Examples of Convention
Hot air naturally flowing upward above a heater
Specific heat of a material is the amount of energy required to do what?
to change 1 g of the material by 1°C or 1 K.
One calorie is the amount of energy required to what?
raise the temperature of 1 g of water by 1°C
Which two temperature scales are a US scientist most likely to use in his or her work?
Celsius and Kelvin
The warmth felt next to a hot fire is mainly due to what?
thermal radiation emitted by the fire
When energy is added to a substance at constant volume and pressure, its temperature increases except what
when the substance is undergoing a phase change
0.239 cal is equivalent to what?
1J
In the context of heat, radiation is the transfer of WHAT by WHAT?
thermal energy; electromagnetic radiation
The emission and absorption of electromagnetic radiation results in the transfer of thermal energy. The best example of this is what?
a microwave oven
Which of the following cannot be the only movement of thermal energy in an isolated system?
thermal energy transferred from a colder object to a hotter object
Convection is the transfer of WHAT along with moving matter.
thermal energy
Calorimetry is what?
the study of thermal energy exchange during thermodynamic processes
Thermal energy is being steadily added to a system. Which two effects do not occur at the same time?
phase change and temperature increase
