In these videos I learned about enthalpy, pressure volume work, state function and path functions. You can tell when something is a state function if it has a capital letter for it’s variable (ex. H, P, and V). You can tell that q is a path function, since it has a lowercase variable, and it is a different value if the path taken to get to it is different. The change in enthalpy is negative if a reaction is exothermic, and is positive if a reaction is endothermic. In these videos we also practiced applying our knowledge to problems and used stoichiometry to find enthalpy.
In this lesson, I learn about enthalpy (deltaH = q) and pressure volume work (work = -P • deltaV)
Question: in the equation deltaH = DeltaE + PdeltaV, enthalpy is the change of heat. but when we start to substitute the terms and turn it into deltaH = q, does that mean enthalpy is just the heat of the system? I’m confuse as to what Enthalpy mean?
Today I learned that enthalpy is change in heat. I learned how to reverse the enthalpy of work systems. I am confused as to why in sample problem 2 , a molar mass was not needed to be found, whereas in problem1 it was required?
In these videos I learned the difference between state functions and path functions, emthalpy, and how to calculate change in enthalpy. The four different ways to calculate change in enthalpy are through stochiometry, calorimetry, Hess’s equation, and big mamma equation. In the notes we practiced finding the change in enthalpy through stochiometry. If the enthalpy is negative, it means that it’s exothermic (releasing energy), and if it’s positive, it means it’s endothermic (absorbing energy).
In this lesson, we are introduced to the 4 ways to calculate change in enthalpy. Also, we learned about pressure work volume.
Question: For the second problem, why is 2 moles of Na2O= -414J?
I learned about enthalpy and state and path functions. State functions don’t depend on the path you take (Ex: height) while path functions do (Ex: heat). A quick way to recognize the difference between the two is that lower case letters represent path functions while upper case letters represent state functions. The change in enthalpy is heat. Four ways to calculate change in enthalpy are stoiochiometry, calorimetry, Hess’s Equation, and Big Momma.
this video was very informational. I enjoyed the step by step transition into creating new equations more relevant to the class.
Why do the same equations and variables have different signs for chemistry as compared to physics? Who played the lovely music in the second video?
In this lesson, I learned about state functions and path functions. I learned about enthalpy and the ways we can interpret it, as well as the ways we can use ti to solve problems relating to the change of heat during a reaction. I also learned about enthalpy when there is constant pressure on the system,
Instead of DeltaV, could it have been DeltaP instead? Or is it that Pressure just doesn’t work that way? I am also a little bit confused on the definition of enthalpy. Is it enthalpy or DeltaH the transfer of heat?
Through these videos, I learned that enthalpy has to do with the change in heat and that there is a difference between state functions and path functions.
Today we learned about enthalpy, pressure volume work, state function and path functions. You can tell when something is a state function if it has a capital letter or if it’s a path function, since it has a lowercase letter.The change in enthalpy is negative if a reaction is exothermic, and is positive if a reaction is endothermic. We also learned to find change in enthalpy by using stoichiometry.
chemistry matters 
In these videos I learned about enthalpy, pressure volume work, state function and path functions. You can tell when something is a state function if it has a capital letter for it’s variable (ex. H, P, and V). You can tell that q is a path function, since it has a lowercase variable, and it is a different value if the path taken to get to it is different. The change in enthalpy is negative if a reaction is exothermic, and is positive if a reaction is endothermic. In these videos we also practiced applying our knowledge to problems and used stoichiometry to find enthalpy.
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In this lesson, I learn about enthalpy (deltaH = q) and pressure volume work (work = -P • deltaV)
Question: in the equation deltaH = DeltaE + PdeltaV, enthalpy is the change of heat. but when we start to substitute the terms and turn it into deltaH = q, does that mean enthalpy is just the heat of the system? I’m confuse as to what Enthalpy mean?
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Today I learned that enthalpy is change in heat. I learned how to reverse the enthalpy of work systems. I am confused as to why in sample problem 2 , a molar mass was not needed to be found, whereas in problem1 it was required?
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In this lesson I learned how to calculate calculate enthalpy using stoichiometry
Question: In a chemistry scenario, how could you know which is the system and the surroundings?
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In these videos I learned the difference between state functions and path functions, emthalpy, and how to calculate change in enthalpy. The four different ways to calculate change in enthalpy are through stochiometry, calorimetry, Hess’s equation, and big mamma equation. In the notes we practiced finding the change in enthalpy through stochiometry. If the enthalpy is negative, it means that it’s exothermic (releasing energy), and if it’s positive, it means it’s endothermic (absorbing energy).
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From this video i learned about Enthalpy and ways of calculating change in enthalpy..
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In this lesson, we are introduced to the 4 ways to calculate change in enthalpy. Also, we learned about pressure work volume.
Question: For the second problem, why is 2 moles of Na2O= -414J?
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I learned about enthalpy and state and path functions. State functions don’t depend on the path you take (Ex: height) while path functions do (Ex: heat). A quick way to recognize the difference between the two is that lower case letters represent path functions while upper case letters represent state functions. The change in enthalpy is heat. Four ways to calculate change in enthalpy are stoiochiometry, calorimetry, Hess’s Equation, and Big Momma.
LikeLike
this video was very informational. I enjoyed the step by step transition into creating new equations more relevant to the class.
Why do the same equations and variables have different signs for chemistry as compared to physics? Who played the lovely music in the second video?
LikeLike
In this lesson, I learned about state functions and path functions. I learned about enthalpy and the ways we can interpret it, as well as the ways we can use ti to solve problems relating to the change of heat during a reaction. I also learned about enthalpy when there is constant pressure on the system,
Instead of DeltaV, could it have been DeltaP instead? Or is it that Pressure just doesn’t work that way? I am also a little bit confused on the definition of enthalpy. Is it enthalpy or DeltaH the transfer of heat?
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So basically enthalpy is the difference of heat/energy between the reactants and products?
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Through these videos, I learned that enthalpy has to do with the change in heat and that there is a difference between state functions and path functions.
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Today we learned about enthalpy, pressure volume work, state function and path functions. You can tell when something is a state function if it has a capital letter or if it’s a path function, since it has a lowercase letter.The change in enthalpy is negative if a reaction is exothermic, and is positive if a reaction is endothermic. We also learned to find change in enthalpy by using stoichiometry.
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