(B) For an adiabatic process,$q = 0$.According to the first law of thermodynamics,$\Delta U = q + w$.Since $q = 0$,we have $\Delta U = w$.During expan

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(B) For an adiabatic process,$q = 0$.According to the first law of thermodynamics,$\Delta U = q + w$.Since $q = 0$,we have $\Delta U = w$.During expansion,the system does work on the surroundings,so $w$ is negative $(w Therefore,$\Delta U$ is negative,which means the internal energy of the system decreases.

Class 11 Chemistry Thermodynamics First law of thermodynamics

Medium

When a system expands under adiabatic conditions,what happens to its internal energy?

A
Temperature increases.
B
Internal energy decreases.
C
Internal energy increases.
D
None of these.

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Thermodynamics

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First law of thermodynamics

The law of conservation of energy states that

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In a closed insulated container,a liquid is stirred with a paddle to increase its temperature. In this process,which of the following is true?

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During the melting of an ice slab at $273 \ K$ and $1 \ atm$ pressure:

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Assertion : For a reaction $2NH_{3(g)} \to N_{2(g)} + 3H_{2(g)}$ ; $\Delta H > \Delta E$.
Reason : Enthalpy change is always greater than internal energy change.

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The enthalpy of vaporization of water at $100 \, ^\circ C$ is $40.63 \, kJ \, mol^{-1}$. The value of $\Delta U$ for this process is ....... $kJ \, mol^{-1}$.

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When a system expands under adiabatic conditions,what happens to its internal energy?

Similar Questions

The law of conservation of energy states that

In a closed insulated container,a liquid is stirred with a paddle to increase its temperature. In this process,which of the following is true?

During the melting of an ice slab at $273 \ K$ and $1 \ atm$ pressure:

Assertion : For a reaction $2NH_{3(g)} \to N_{2(g)} + 3H_{2(g)}$ ; $\Delta H > \Delta E$.Reason : Enthalpy change is always greater than internal energy change.

The enthalpy of vaporization of water at $100 \, ^\circ C$ is $40.63 \, kJ \, mol^{-1}$. The value of $\Delta U$ for this process is ....... $kJ \, mol^{-1}$.

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Assertion : For a reaction $2NH_{3(g)} \to N_{2(g)} + 3H_{2(g)}$ ; $\Delta H > \Delta E$.
Reason : Enthalpy change is always greater than internal energy change.