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All 8 questions. After you submit, each question shows the right answer and why. Back to the quick check
A reaction that gives out heat, like something burning, is called exothermic.
What does a catalyst do to a chemical reaction?
Breaking chemical bonds releases energy.
Forming liquid water from hydrogen and oxygen has ΔH°f = −285.83 kJ/mol. What is ΔH, in kJ/mol, for splitting one mole of liquid water back into hydrogen and oxygen?
A chemist plots ln k against 1/T for a reaction and gets a straight line. What does its slope tell her?
According to the Arrhenius equation k = A·exp(−Eₐ/RT), which change increases the rate constant?
Using ΔfH°(CO₂, g) = −393.51, ΔfH°(H₂O, l) = −285.83 and ΔfH°(CH₄, g) = −74.6 kJ/mol (O₂ = 0), calculate ΔH° for CH₄ + 2O₂ → CO₂ + 2H₂O(l), in kJ/mol, to one decimal place.
Explain why a catalyst speeds a reaction yet leaves its equilibrium constant unchanged, referring to the forward and reverse barriers.
