The reaction CaO( s ) + SO 3 ( g ) CaSO 4 ( s ) is nonspontaneous at 2200 K, whe
ID: 969979 • Letter: T
Question
The reaction CaO(s) + SO3(g) CaSO4(s) is nonspontaneous at 2200 K, whereas it is spontaneous at room temperature. Which of the following statements is false?
G becomes zero at a temperature between 300 and 2200 K.
G is negative at room temperature.
The change in enthalpy is the main driving force of the reaction.
The change in entropy is the main driving force of the reaction.
Both H and S are negative for the reaction.
A.G becomes zero at a temperature between 300 and 2200 K.
B.G is negative at room temperature.
C.The change in enthalpy is the main driving force of the reaction.
D.The change in entropy is the main driving force of the reaction.
E.Both H and S are negative for the reaction.
Explanation / Answer
Answer is option C
The change in enthalpy is the main driving force of the reaction
is false statement
G = H - T(S)
at 2200 K reaction is nonspontaneous means G >0
where as spontaneous at room temperature which means at 298 K G<0
G changed from -ve to +ve in the rage of 298K to 2200 K
so option 1 is correct
he clearly said that spontanius at rt means G is negative
so option B is also correct
C.The change in enthalpy is the main driving force of the reaction
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