Temperature
What are the three types of scales we use for temperature?
Celsius, Fahrenheit, Kelvin
C,F,K
Radiation, Convection, Conduction
Entropy can be defined as the amount of________ in a system
disorder
How many laws of thermodynamics did we discuss?
2
-1567.5 Joules
If you have 75 degrees F what is it in C
23.8889 or 23.9
You walk outside barefoot to run after the ice cream truck, but you burn yourself because the sidewalk was hot.
Name the two types of heat transfers in the scenario
* radiation- the sun heated up the sidewalk
*convection- there was direct contact with the bare foot and sidewalk
In what state would water have low amount of entropy (disorder)
solid
What is the 1st law of thermodynamics?
energy in a system cannot be created or destroyed
How much energy is required to heat 120.0 g of water from 2.0 °C to 24.0 °C? (Cp of H2O = 4.184 J/g °C)
11045.76 Joules
What is 45 degrees C to F
113
it is a cold day and you want to make yourself some tea, the water from the tea kettle will be warmed up thanks to what form of heat transfer?
Convection
If something has high disorder than it is high in...
entropy
What is the second law of thermodynamics?
Entropy can either stay at the same level or increase but never decrease.
as you put the cake from the oven on a cold counter the counter becomes hot this is because the heat travels from something _____to something ______
hot to cold
What is 300 C to Kelvin
573.15
You are baking a cake and get to close to the oven and burn yourself because of what type of heat transfer?
conduction
If particles are moving fast they are______
If particles are moving slow they are______
hot
cold
When the temperature is at absolute zero (Kelvin) no motion exists. This is the third law of thermodynamics. How much entropy is in the system
entropy is 0
If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0 °C to 27.0 °C, what is the specific heat of the gold?
.1313 J/g C
What is 700K to C ?
426.85
You come home from a long day of skiing and you stand near a fire, you warm yourself up thanks to what heat transfer
radiation
describe the entropy in each of the following
* solid block of ice
*liquid nitrogen
* oxygen gas
*low
*intermediate
*High
Energy is measure is what two units
Joules and calories
A 55 kg block of metal has an original temperature of 15.0°C and 0.45 J/g∙°C. What will be the final temperature of this metal if 450 J of heat energy are added?
33.2 Celsius