straight fire

[thermochem]

Wow!! Your blog is so useful!!! Can you tell me more about the chemicals that make booty so steamy!! Thanks!!

well, there must be some kind of negative change in enthalpy in the booty that’s making an exothermic reaction happen and thus creating heat and making the booty “steamy”. 

i wonder why there would be a change in enthalpy in a pirate’s chest full of gold and other treasure and booty though??? hmm. 

[thermochem]

EUREKA!!

i think i figured it out, you guys!!!!!1! remember how i said that i was going to be an important chemist someday?? i think that this is my chance. 

i was lying in bed last night, thinking about thermochemistry to make me happy before i fell asleep, when i did it!!!!1!!!!1 i came up with a law of my own!!!11!! i’m going to call it Hess’s Law (how original???!!1!?!?)

it basically says that if you can add two or more thermochemical equations together to make a final equation for a reaction, then the sum of the enthalpy (heat) changes for the individual reactions is the enthalpy (heat) change for the WHOLE final reaction!!1!!1! you can use it like this:

how did no one think of this before??? amazing!!!11!

[jupiterlanding]

I drew all of the chemicals I’m deficient in

[thermochem]

:( if you read your chemistry textbook, i’m sure you’ll be happy again!!!1! that never fails to make me smile :)

~follow for more soft chemistry~

[thermochem]

i'm cramming for a chem test on energy and thermochemistry :c what are some equations i should know?

tsk tsk!!1! i never cram for tests in chemistry. i LOVE the subject so much that i’ve memorized everything already!!!!1!!!11!

you should at LEAST know these equations:

1) q = c x m x ΔT

this equation shows the heat absorbed or released by a substance during a change in temperature. the heat absorbed or released depends on the specific heat of the substance, the mass of the substance, and the amount by which the temperature changes. q = heat absorbed or released, c = specific heat of the substance, m = mass of the sample in grams, and ΔT = the change in temperature in degrees Celsius.

2) ΔH°rxn= ƩΔH°f (products) – ƩΔH°f (reactants)

this formula has to do with the standard enthalpy (heat) of formation (ΔH°f), which is the change in enthalpy (heat) that happens as a result of the formation of one mole of a compound in its standard states from the elements that make it up in their standard states. the equation says to subtract of sum of heats of formation of the reactants from the sum of the heats of formation of the products.

3) ΔGsystem= ΔHsystem – TΔSsystem 

this equation shows the change in free energy, or the energy that is available to do work for reactions or processes that take place at constant pressure and temperature (it’s also called useful energy). the change of free energy in a system (ΔGsystem) is the difference between the system’s change in enthalpy (heat) (ΔHsystem) and the product of the Kelvin temperature and the change in entropy (TΔSsystem). when a reaction or process occurs at STP (298K and one atm), then the standard change in free energy can be written like this:

ΔG°system= ΔH°system – TΔS°system

If the ΔG°system is positive, the reaction isNOT spontaneous, but if it is negative, the reaction IS spontaneous.

i hope this helped, you chemistry slacker. SMH!!11!

[thermochem]

wow, i love your blog! can you teach me a little more about the theories behind thermochemistry?

sure i can! i’m so excited to meet another person who’s just as interested in thermodynamic chemistry as i am wow!!1! 

first up, i’ll tell that thermochemistry is the study of heat changes in chemical reactions and phase changes.

let’s talk about energy and heat, which is pretty much what thermochemistry is all about. there’s kinetic energy (energy of motion), free energy (energy available to do work for reactions or processes that take place at constant pressure and temperature) and potential energy (energy due to the composition or position of an object). energy can be measured in joules (SI unit). calories help measure heat - one calorie is the amount of heat required to raise the temperature of one gram of pure water by one degree Celsius, and the specific heat of any substance is how many calories are needed to raise the temperature of one gram of that substance by one degree Celsius.

now i’ll walk you through the first two laws of thermodynamics!!1! 

first law of thermodynamics: AKA the law of conservation of energy. energy can be converted from one form to another, but it’s neither created nor destroyed

second law of thermodynamics: AKA the law of disorder. it says that the entropy of the universe, or disorder and randomness of the particles in a system, must increase as a result of a spontaneous reaction or process.

speaking of which!! did you know???,? exothermic reactions are usually spontaneous because they increase the entropy of the surroundings!! isn’t that cool???!?!1!??

i’m going to go read my favorite book (surprise!! it’s my thermochemistry textbook) now, but i hope this helped you understand thermodynamic chemistry a little better!!!1!!1!

[eeffortless-ly]

[thermochem]

wow, what a cool GIF!!1! want to know why it’s melting?? i’ll tell you everything. don’t worry. i’m REALLY good at chemistry, espcially thermochemistry.

the heat needed to make one mole of a solid substance undergo fusion (or “melt”, as i know you non-chemistry plebeians like to call it) is called its molar enthalpy (heat) of fusion (∆Hfus)   . if this ice cream were just ice and it were melting into water, then you would write the melting of the ice as 

H2O (s) –> H2O (l) ∆Hfus = 6.01 kJ

this shows that 6.01 kJ of energy is absorbed in order to melt one mole of ice.

if you want to vaporize something, then you would need the right molar enthalpy (heat) of vaporization (∆Hvap) , which is the heat required to vaporzie one mole of a liquid substance.

because vaporizing a liquid and melting a solid are both endothermic processes (they absorb heat), they have positive ∆H values. if you wanted to condense or freeze a substance, then the ∆H values would be negative because those are exothermic processes (they release heat) and are the opposites of vaporizing and melting.

~follow for more soft thermodynamic chemistry~

[chorrong]

Haircut+return of bangs!!!1!!!

[thermochem]

wow are you the sun? because you’re so hot that you must be undergoing constant exothermic reactions in order to produce energy in the form of heat as a result of a negative change in enthalpy (AKA heat gain by a system during a reaction or process carried out at constant pressure)!!!1!

fun thermochestiry factoid!!1! when the change in enthalpy, or ΔH, is positive, then the reaction is endothermic and chemical potential energy in the form of heat is absorbed. when ΔH is negative, then the reaction is exothermic and heat is released!! wow, i sure love chemistry.

anyways.

sigh. is this love? you can’t deny the chemistry between the two of us!!1!!! (did you like the pun??? :D) it feels like love at first like/reblog. in this thermodynamic universe, you’re everything to me. you’re both the system (the reaction or process that is happening and releasing or absorbing potential energy in the form of heat gain or heat loss) AND the surroundings (everything else in the universe except the system). sigh. 

~follow for more soft thermodynamic chemistry~

[oonachaplinsarchive-deactivated]

[thermochem]

As many of you know, I have a background as a chemistry teacher. I’ve come to realize that much of what I teach my students applies not only to what goes on in the classroom, but in life also. It’s not as crazy as it sounds. You see, technically, chemistry is the study of matter, but I prefer to see it as the study of change: Electrons change their energy levels. Molecules change their bonds. Elements combine and change into compounds. But that’s all of life, right? It’s the constant, it’s the cycle. It’s solution, dissolution. Just over and over and over. It is growth, then decay, then transformation. It’s fascinating really. It’s a shame so many of us never take time to consider its implications.

oh boy! chemistry! i love chemistry!!!1!! and this picture even has fire in it! thermochemistry involves fire because the production of fire follows as a result of an exothermic reaction and the release of energy! did you know that chemical potential energy is energy stored in the chemical bonds of a substance through the way that the atoms and molecules of the substance are arranged??

~follow for more soft thermodynamic chemistry~

[thermochem]

hi world!

it’s ya boy germain hess here B)

i’ve decided to start a tumblr so that i can hang out with the other kool kids and share my ideas about chemistry and thermodynamics with the world! i’m so excited. i sure do love thermochemistry! i feel really pumped up, like i have a lot of energy - which we all know is the capacity to do work or to produce heat, like body heat. as i’m sure my fellow chemistry followers here know, energy may change from one form to another, but the amount of energy does not change.

sorry, am i getting sidetracked by science? :/ i always do LOL it’s just so great!!1!!1!!!

have i mentioned that i love thermochemistry yet? someday, i’m going to be an important chemist in the field of energy and heat and thermodynamics. you just wait.