True/ False A. _The emf of a voltaic cell can change with temperature. B. _A reaction with a...

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Chemistry

True/ False
A. ___The emf of a voltaic cell can change withtemperature.
B. _A reaction with a negative value of ï„S and a positivevalue of ï„H at a given temperature is not spontaneous at thattemperature.
C. _The change in entropy is positive when a piece of tablesugar dissolves in water.
D. _A ligand is always a Lewis base.
E. _A hydrogen fuel cell requires oxygen to operate.
F. _When the temperature of a ferromagnetic material israised to a high enough level, it becomes diamagnetic.
G. _The solubility of barium hydroxide is higher in purewater than it is in 1.0M hydrochloric acid.
H. _In any reversible process, the entropy remainsconstant.
I. _If two molecules are isomers of each other, they alwayshave the same chemical formula.
J. _A square planar molecule can never be chiral.
K. _The entropy of an element in its standard state iszero.
L. ___At equilibrium, the change in free energy for a givenreaction is zero.

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3.7 Ratings (354 Votes)

A true Nernst equation supports the statement increase in temperature decreases cell potential B True for a system to be spontaneous entropy must be ve and enthalpy ve C True dissolution of sugar is spontaneous dissolution of sugar solid in water is See Answer

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True/ False A. _____The emf of a voltaic cell can change with temperature. B. _____A reaction with a...