The word, “Free” in Gibbs Free Energy can be often confusing and I will try to address this aspect in simplified manner. Enthalpy is the total heat content, which means the internal energy + the product of pressure and volume. However, all enthalpy is not available to do work. The reason is the entropy or disorder. Nature seems to prefer disorder in broader sense as it does not like to spend energy to arrange things (there may be symmetries and orderliness in local/system/surrounding context but in broader context, i.e. in the context of the universe/multiverse, the disorder wins). Some enthalpy is spent in entropy. The remaining is left to do work and because that is what is available to do work, it is called available energy or free energy.
All posts by Engineer Manish Verma
Vector & 3D Classes
Previews of all the 17 classes can be seen below.
Hollow Prism Q & A
Question (one option correct type):
A beam of light passes through a hollow glass prism. Then,
A) the beam of light undergoes lesser but some dispersion compared to solid glass prism
B) the beam of light is totally internally reflected and does not come out through the opposite face
C) the beam of light does not undergo dispersion at all and comes out parallel to the incident ray
D) the beam of light undergoes angular deviation
Continue reading Hollow Prism Q & A
$$\int\limits_{ – 1}^2 {\left| {{x^3} – x} \right|} dx$$
Evaluate:
$\int\limits_{ – 1}^2 {\left| {{x^3} – x} \right|dx}$
[CBSE 2012]
Solution
Continue reading $$\int\limits_{ – 1}^2 {\left| {{x^3} – x} \right|} dx$$
Do capacitors in series always have the same charge?
The explanation is provided in the short video embedded below.
$\int\limits_0^{ – 2a} {f(x)dx} = ………$
If the system of equations 2x – y + z =0, x- 2y + z = 0 and ax – y + 2z = 0 has infinitely many solutions and f(x) is continuous function satisfying f(x)+f(x+5) = 2, then $\int\limits_0^{ – 2a} {f(x)dx}$ is equal to
a) 0
b) 5
c) a
d) –2a
Solution
