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In which reaction(s), DeltaS in negative...

In which reaction(s), `DeltaS` in negative?

A

`H_(2)O(l)toH_(2)O(g)`

B

`H_(2)O(s)toH_(2)O(l)`

C

`H_(2)O(g)toH_(2)O(s)`

D

`H_(2)O(s)toH_(2)O(g)`

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For which of the process, Delta S is negative?

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For a sponaneous reaction, the free energy change must be negative, Delta G=Delta H-T Delta S, Delta H is the enthalpy change during the reaction. T is the absolute temperature, and Delta S is the change in entropy during the reaction. Consider a reaction such as the formation of an oxide M+O_(2) to MO Dioxygen is used up in the course of this reaction. Gases have a more random structure (less ordered) than liquid or solids. Consequently gases have a higher entropy than liquids and solids. In this reaction S (entropy or randomness) decreases, hence Delta S is negative. Thus, if the temperature is raised then T Delta S becomes more negative,Since, TDelta S is substracted in the equation, then Delta G becomes less negative. Thus, the free energy change increases with the increase in temperature. The free energy changes that occur when one mole of common reactant (in this case dioxygen) is used may be plotted graphically aginst temperature for a number of reactions of metals to their oxides. The following plot is called an Ellingham diagram for metal oxide. Understanding of Ellingham diagram is extremely important for the efficient extraction of metals. For the conversion of Ca(s) to Ca(s) which of the following represent the Delta G vs. T ?

For a sponaneous reaction, the free energy change must be negative, Delta G=Delta H-T Delta S, Delta H is the enthalpy change during the reaction. T is the absolute temperature, and Delta S is the change in entropy during the reaction. Consider a reaction such as the formation of an oxide M+O_(2) to MO Dioxygen is used up in the course of this reaction. Gases have a more random structure (less ordered) than liquid or solids. Consequently gases have a higher entropy than liquids and solids. In this reaction S (entropy or randomness) decreases, hence Delta S is negative. Thus, if the temperature is raised then T Delta S becomes more negative,Since, TDelta S is substracted in the equation, then Delta G becomes less negative. Thus, the free energy change increases with the increase in temperature. The free energy changes that occur when one mole of common reactant (in this case dioxygen) is used may be plotted graphically aginst temperature for a number of reactions of metals to their oxides. The following plot is called an Ellingham diagram for metal oxide. Understanding of Ellingham diagram is extremely important for the efficient extraction of metals. As per the Ellingham diagram of oxides which of the following conclusion is true ?

For a sponaneous reaction, the free energy change must be negative, Delta G=Delta H-T Delta S, Delta H is the enthalpy change during the reaction. T is the absolute temperature, and Delta S is the change in entropy during the reaction. Consider a reaction such as the formation of an oxide M+O_(2) to MO Dioxygen is used up in the course of this reaction. Gases have a more random structure (less ordered) than liquid or solids. Consequently gases have a higher entropy than liquids and solids. In this reaction S (entropy or randomness) decreases, hence Delta S is negative. Thus, if the temperature is raised then T Delta S becomes more negative,Since, TDelta S is substracted in the equation, then Delta G becomes less negative. Thus, the free energy change increases with the increase in temperature. The free energy changes that occur when one mole of common reactant (in this case dioxygen) is used may be plotted graphically aginst temperature for a number of reactions of metals to their oxides. The following plot is called an Ellingham diagram for metal oxide. Understanding of Ellingham diagram is extremely important for the efficient extraction of metals. Which of the following elements can be prepared by heating the oxide above 400^(@)C ?

ALLEN-Thermodynamics And Thermo Chemistry-All Questions
  1. Which of the following statements are true

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  2. Which of the following is true for spontaeous process :-

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  3. In which reaction(s), DeltaS in negative?

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  4. Which of the following value of heat of formation indicates that prod...

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  5. Enthalpy change for reaction 1//2H(2)(g)+1//2Cl(2)(g)toHCl(g) is...

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  6. For the reaction PCl(5)(g)toPCl(3)(g)+Cl(2)(g) where ΔH and ΔE represe...

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  7. In an adiabatic expansion of ideal gas

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  8. The heat of combustion of ethanol determined in a bomb calorimeter is ...

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  9. 4S(s)+602to4SO(3)(g),DeltaH f or this reaction is - 1583.2 kJ . The e...

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  10. The heat change for the reaction C(s)+2S(s)toCS(2)(l) is called the...

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  11. Based on the following thermochemical equations H(2)O(g)+C(s)rarrCO(...

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  12. In the reversible reaction of the type A+B hArr AB, in general.

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  13. If enthalpies of formation of C(2)H(4)(g),CO(2)(g) and H(2)O(l) at 25^...

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  14. Given that , C(s) + O(2)(g) to CO(2)(g), DeltaH^(@)=-xKJ 2CO(g) + ...

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  15. Identify the correct statement regarding entropy

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  16. Change in enthalpy for reaction, 2H(2)O(2)(l) to 2H(2)O(l) + O(2)(g) i...

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  17. When 1 mole gas is heated at constant volume, temperature is raised fr...

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  18. For which one of the following equations DeltaH(r)^(@) equal to DeltaH...

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  19. Internal energy of an ideal gas depends upon a) Temperature only b) vo...

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  20. The process in which no heat enters or leaves the system is termed as

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