Thermodynamics ...

The heat capacity of a bomb calorimeter is $$500  J  K^{ -1 }$$. When $$0.1  g$$ of Methane was burnt in this calorimeter, the temperature rose by $$2^{ \circ }C$$. The value of $$\Delta U$$ per mole will be :

The free energy changes for the two reactions given below are:

Which law of thermodynamics states that energy can neither be created nor be destroyed, it can change from one to another?

Hess law is applicable for determination of enthalpy of

A change in the free energy of a system at constant temperature and pressure will be:

$$\Delta_{ sys }G = \Delta_{ sys }H - T\Delta_{ sys }S$$

At constant temperature and pressure

$$\Delta_{ sys }G < 0 (spontaneous)$$
$$\Delta_{ sys }G = 0 (equilibrium)$$
$$\Delta_{ sys }G > 0 (non-spontaneous)$$

The free energy for a reaction having $$\Delta H = 31400  cal$$, $$\Delta S = 32  cal  K^{ -1 }  mol^{ -1 }$$ at $$1000^{ \circ }C$$ is?

The heat of hydrogenation of ethene is $$x_1$$ and that of benzene is $$x_2$$
Hence resonance energy of benzene is

$$C(diamond) + 2H_2(g)\longrightarrow CH_4(g);\,\,\Delta H_1$$ 

$$H_2(g) + Br_2(g)\longrightarrow 2HBr(g);  \Delta H^{ \ominus } = -72.40  kJ$$
$$\Delta G^{ \ominus } = -106.49  kJ, T = 298  K$$
The value $$\Delta S$$ is . 

A bomb calorimeter is used to measure the value of heat of reaction at a constant