Given the equation C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) at 25◦C and 1.00 atm. Calcualte the following: a) ∆H◦rxn ; Is the reaction endothermic or exothermic? Explain your answer.
b) ∆S◦rxn ; Is the reaction spontaneous with respect to entropy? Explain your answer.
c) ∆G of the reaction. Is the reaction spontaneous with respect to the Gibbs Free energy? Explain your answer.

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c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.