Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 66

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The internal energy change when a system goes from state $A$ to $B$ is 40 kJ/mol. If the system goes from $A$ to $B$ by a reversible path and returns to state $A$ by an irreversible path, what would be the net change in internal energy?

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Important Questions on Thermodynamics

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 67

Heat exchanged in a chemical reaction at the constant temperature and pressure is known as:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 68

For the isothermal expansion of an ideal gas

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 69

A gas expands isothermally against a constant external pressure of

1 atm

and from a volume of

10 d m^{3}

to a volume of

20 d m^{3}

. It absorbs

800 J

of thermal energy from its surroundings. What is the value of

∆ U

?

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 70

One mole of non-ideal gas undergoes a change of state

(1.0 atm, 3.0 L, 200 K)

to

(4.0 atm, 5.0 L, 250 K)

, with a change in internal energy

(ΔU) = 40 L - atm

. The change in enthalpy of the process in

L - atm

;

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 71

For a real gas reaction

2 CO (g) + O_{2} (g) \to 2 {CO}_{2} (g)

,

∆ H = - 560 kJ

, which takes place in a

10 L

rigid vessel, at

500 K

. The initial pressure is

70 bar

and after the reaction it becomes

40 bar

. The change in internal energy is

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 72

A vessel contains

100

litres of a liquid

X

. Heat is supplied to the liquid in such a fashion that, Heat given

=

change in enthalpy. The volume of the liquid increases by

2

litres. If the external pressure is one atm, and

202.6

Joules of heat were supplied then, [

U

- total internal energy]

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 73

The work done in adiabatic process on ideal gas by a constant external pressure would be equal to:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 74

A certain amount of zinc is dissolved in

HCl

at

25 ° C

in an open vessel. The type of process and the work done by the system, respectively would be: