Vocab test 3 - Fill in the blank

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For spontaneous adsorption of gas (at constant pressure)

• ΔS is negative so ΔH should be highly positive

• ΔS is negative so ΔH should be highly negative

• ΔS is positive so ΔH should also be highly positive

• ΔS is positive so ΔH should be negative

At which of the following temperatures the reaction C(graphite) + CO2 (g) → 2CO(g) will occur spontaneously if ΔH = 170 kJ and ΔS = 170 J/K?

• 1110K

• 910K

• 710K

• 510K

What is the unit of entropy?

• J mol^-1

• J K mol^-1

• J^-1 K^-1 mol^-1

• J K^-1 mol^-1

Which of the following is true for the entropy of an isolated system?

• It can never increase

• It can never decrease

• It can never be zero

• None of the mentioned