Work (w)
What does the symbol F stand for?
Force
What does the symbol m stand for?
Mass
What does the symbol dU or internal energy mean
The flow of work and heat in a finite system.
What does the symbol P stand for?
Pressure
What does the symbol T stand for?
Current temperature
What does the symbol dV stand for?
A change in volume or displacement
What does the symbol dT stand for?
Change in temperature
What does it mean to have a positive internal energy?
For more energy to be going into the system.
What does the symbol V stand for?
Volume
What does the symbol dS stand for?
A change in Entropy
True or false: If 1,000,000 J of force is applied to a house but the house does not move then work is still done because force was applied.
False:
If no movement occurs then work was not done.
What does the symbol Cs stand for?
(Bonus points if you can describe what it means)
Specific heat
Bonus: How hard it is to heat up a specific substance 1C.
What does it mean to have a negative internal energy?
For more energy to be leaving the system
What does the value dH or a change in enthalpy stand for?
The sum of energies or the change in sum of energies.
What does Gibbs free energy or dG stand for?
Accessible energy or the overall change in accessible energy.
If 100 Newtons of force were applied moving an object 50 meters then how much work was done?
5,000 Joules of work
In class we've often used the Cs of water which is 4.184. But other substances have different Cs values. Why is that?
Because when a substance increases in temperature that means the molecules are vibrating more. And due to intramolecular and intermolecular forces being different between unique molecules, the amount of heat required to break and weaken those bonds is different.
If I am attempting to boil water and 4,000 Joules of heat is applied and 2,000 Joules of work leaves through steam, then what is the internal energy of the system.
+2,000 Joules of energy
If the internal energy (dU) of a system is 2,000 J and the system has a volume of 100 mL and a pressure of 5 Pa, then what is the enthalpy (dH) of the system.
2,500 Joules
What does it mean to have a positive dG value?
If 1,000 Joules of work were done by 50 Newtons of force being applied to an object, then how much did that object move?
20 meters
If 50,208 Joules of energy is applied to water and the water changed 80 C then what was the initial mass of the water?
(Cs = 4.184)
150 grams
50,208 / (4.184 x 80) = 150
If 100 Joules of heat are added to a bomb to allow for a combustion to happen and 20,000 Joules of heat and 5,000 Joules of work are released, then what is the internal energy of the system?
24,900 Joules of energy
If the internal energy (dU) of a system is -1,000 J and the system has a volume of 200 mL and a pressure of 10 Pa, then what is the enthalpy (dH) of the system.
1000 Joules
If there is a system that has an Enthalpy (dH) value of 3,000 J and there is a entropy value of 50 J at 10 C then what is the Gibbs free energy?
2,500 Joules