For the reaction mgso3(s) → mgo(s) + so2(g), which is spontaneous only at high temperatures, one would predict thata. δh˚ is negative and δs˚ is negativeb. δh˚ is positive and b. δs˚ is negativec. δh˚ is positive and δs˚ is positived. δh˚ is negative and δs˚ is positive

c. ΔH˚ is positive and ΔS˚ is positive

Explanation:

According to Gibb's equation:

= Gibbs free energy  

= enthalpy change

= entropy change  

T = temperature in Kelvin

= +ve, reaction is non spontaneous

= -ve, reaction is spontaneous

= 0, reaction is in equilibrium

Thus for

Case :

>

when both have positive values.

Reaction is spontaneous only at at high temperatures.

2b2t

explanation:

2b2t

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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