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Thermodynamics

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Thermodynamics Class 11th

A balloon filled with helium (32°C and 1.7 atm.) bursts. Immediately afterwards the expansion of helium can be considered as:
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alok kumar singh

Contributor-Level 10

After burning, heat exchange occurs between helium and atmospheric. Hence, irreversible, isothermal process.

New answer posted

a month ago

Thermodynamics Class 11th

Consider a gas of triatomic molecules. The molecules are assumed to be triangular and made of massless rigid rods whose vertices are occupied by atoms. The internal energy of a mole of the gas at temperature T is:

 
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alok kumar singh

Contributor-Level 10

The internal energy of one mole of an ideal gas is given by U = (f/2)RT, where f is the number of degrees of freedom.
For a non-linear triatomic molecule (assumed to be a rigid rotator), there are:

3 translational degrees of freedom.

3 rotational degrees of freedom.
Vibrational modes are generally not considered at temperature T unless specified.
Total degrees of freedom f = 3 + 3 = 6.
U = (6/2)RT = 3RT.

 

New question posted

a month ago

Thermodynamics Class 11th

Consider a gas of triatomic molecules. The molecules are assumed to be triangular and made of massless rigid rods whose vertices are occupied by atoms. The internal energy of a mole of the gas at temperature T is:
0 Follower 2 Views

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