Thermodynamics ...

The heats of combustion of rhombic and monoclinic sulphur are $$-70960$$ and $$-71030$$ calorie respectively. What will be the heat of conversion of rhombic sulphur to monoclinic sulphur?

The heats of combustion of yellow phosphorus and red phosphorus are $$-9.91kJ$$ and $$-8.78kJ$$ respectively. The heat of transition of yellow phosphorus to red phosphorus is:

For an exothermic reaction to be spontaneous:

For which reaction from the following, $$\Delta S$$ will be maximum?

On combustion carbon forms two oxides $$CO$$ and $${CO}_{2}$$, heat of formation of $${CO}_{2}$$ is $$-94.3\ kcal$$ and that of $$CO$$ is $$-26.0 \ kcal$$. Heat of combustion of carbon is:

The heat of combustion of ethanol determined in a bomb calorimeter is $$-670.48kcal$$ $${mol}^{-1}$$ at $$298K$$. What is the $$\Delta U$$ at $$298K$$ for the reaction?

$$\Delta { G }^{ o }$$ for the reaction $$x+y\rightleftharpoons z$$ is $$-4.606kcal$$. The value of equilibrium constant of the reaction at $${227}^{o}C$$ is:
($$R=2.0cal.{mol}^{-1}{K}^{-1}$$)

Considering entropy(s) as a thermodynamic parameter, the criterion for the spontaneity of any process is:

Calculate $$\triangle G^{\circ}$$ for the following cell reaction:

Which of the following is true for spontaneous process?