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

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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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Important Questions on Thermodynamics

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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:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 75

Two moles of an ideal gas expands spontaneously into a vacuum. The work done is

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 76

If

1

mole

of an ideal gas expands isothermally at

37 ° C

from

15

litres to

25

litres, the maximum work obtained is:

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Alpha Question Bank for Medical: Chemistry>Chapter 4 - Thermodynamics>Exercise 1>Q 77

Two moles of Helium gas undergo a reversible cyclic process as shown in figure. Assuming gas to be ideal. What is the work for the process $C$ to $D$ ?

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