Thermodynamics ...

Calculate work done.

In which process volume increases?

Hess' Law and bond energy data can be used to calculate the enthalpy change of a reaction. Bromoethane, $$CH_2CH_2Br$$, can be made by reacting ethene with hydrogen bromide.
$$CH_2=CH_2+HBr\rightarrow CH_3CH_2Br$$
What is the enthalpy change for this reaction?

The resultant heat change in a reaction is the same whether it takes
place in one or several stages. This statement is called:

An ideal gas undergoes a cyclic process as shown in figure;
$$\Delta u_{BC}=-5 KJ mol^{-1}, q_{AB}= 2 KJ mol^{-1}$$
$$w_{AB}= -5 KJ mol^{-1},W_{CA}=3 KJ mol^{-1}$$

For which of the following reaction $$\Delta H$$ is equal to $$\Delta u$$?

Which statement about reactions that produce heat is not correct?

In which case is a reaction possible at any temperature?

A gas is expanded from volume $$ V_0$$ and $$2V_0 $$ under three different processes. Process 1 is isobaric, process 2 is isothermal and process 3 is adiabatic . Let $$ \triangle U_1, \triangle U_2 $$ and $$\triangle U_3 $$ be the change in internal energy of the gas in these process. then : 

In a reaction $$\Delta H$$ and $$\Delta S$$ both are more than zero. In which of the following cases would the reaction be spontaneous?