Thermodynamics Chemistry Set 10

Diborane is a potential rocket fuel which undergoes combustion according to the equation
<img width=257 height=20 src="https://mytat.co/uploads/question/THERMODYNAMICS-1_filesimage876.png">
Calculate the enthalpy change for the combustion of diborane. Given
(i)<img width=262 height=27 src="https://mytat.co/uploads/question/THERMODYNAMICS-1_filesimage877.png">kJ per mol
(ii)<img width=249 height=27 src="https://mytat.co/uploads/question/THERMODYNAMICS-1_filesimage878.png">kJ per mol
(iii)<img width=178 height=20 src="https://mytat.co/uploads/question/THERMODYNAMICS-1_filesimage879.png">kJ per mol
(iv)<img width=232 height=20 src="https://mytat.co/uploads/question/THERMODYNAMICS-1_filesimage880.png"> kJ per mol

To calculate the amount of work done in joules during reversible isothermal expansion of an ideal gas, the volume must be expressed in

Calorific value of carbohydrates is approximately:

For a given substance and are freezing point and melting point of a substance. Which of the graph represents correctly, the variation of with temperature?

Which is correct for an endothermic reaction?

When a solid melts, there is:

Maximum entropy will be in which of the following?

When enthalpy and entropy change for a chemical reaction are cal and 7.4 cal predict the reaction at 298 K is

A closed flask contains water in all its three states, solids, liquid and vapour at In this situation the average KE of the water molecule will be:

If  and  then, the heat of formation of CO is