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(Could you explain how I can answer the question and what the equation I will use)....

(Could you explain how I can answer the question and what the equation I will use).

1-Calculate the pH of an acetic acid (CH3CO2H)/ sodium acetate (NaCH3CO2) buffer Containing (0.0400 M CH3CO2H) and (0.080 M NaCH3CO2).

Chemical Equation=

pH=

2- Calculate the net Values of ΔH° and ΔS° for the reaction:

CH4(g) + 2O2(g) --> CO2(g) + 2 H2O(g)

ΔH°=

ΔS°=

ΔG°=

Is this reaction spontaneous ? Clearly explain your answer.

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