True or False? _____ a. When the sign of Delta G degree is negative and the sign

Question

True or False? _____ a. When the sign of Delta G degree is negative and the sign of E degree _cell is positive, the reaction is spontaneous at all conditions. _____ b. In the following reaction, we expect Delta S degree Ca_(s) > Ba_(s) _____ d. The anions in the salt bridge in a voltaic cell migrate into the anode half-cell to balance the charge and complete the circuit. e. A reaction that has negative Delta H and positive Delta S is a spontaneous reaction at all temperatures. _____ f. A reaction with a positive enthalpy change is never a spontaneous reaction.

Explanation / Answer

a)

False

The reaction will be spontaneous only at standard condition when Eocell is positive and delta Go is negative

b)

True

since solid has less entropy that aqueous components

c)

False

for compound in same phase, as molar mass increases entropy increases

so, correct order of entropy is:

Mg(s) < Ca(s) < Ba(s)

d)

True

electron move from anode to cathode

so, anion move from cathode to anode

e)

True

G = H - T*S

since H is negative and S is positive, G will always be negative

f)

False

It depends on the value of s and T

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