In a flask colourless N2O4 is in equilib...

In a flask colourless `N_2O_4` is in equilibrium with brown colourless `NO_2`. At equilibrium when the flask is heated at `100^Oc` the brown colour deepens and on cooling it becomes less coloured. The change in enthalpy `DaltaH`, for the system is:

Negative

Positive

Zero

Undefined

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

ENVIRONMENTAL CHEMISTRY
MBD PUBLICATION|Exercise QUESTION BANK|299 Videos
GENERAL PRINCIPLES OF ISOLATION OF ELEMENTS
MBD PUBLICATION|Exercise QUESTION BANK|564 Videos

Similar Questions

Explore conceptually related problems

1 mole of N_2O_4 is heated in a flask with a volume of 10 dm^3 . At equillibrium 1.708 mole of NO_2 and 0.146 mole of N_2O_4 were found at 134^@c calculate the equillibrium constant .

One mole of N_2O_4 (g) at 300k is kept in a closed container under one atmospheric pressure. It is heated to 600 k when 20 % by mass of N_2O_4 (g) decomposes to NO_2(g) . The resultant pressure is :

An equilibrium mixture of the reaction 2NO(g) +O_2(g) hArr 2NO_2(g) contains 0.120 mole of NO_2 , 0.080 mole of 0.640 mole of O_2 in a 4 litre flask at a constant temperature . The value K_c for the reaction at this temperature is :

An organic compound (P) having molecular formula C_(9)H_(10)O form an orange precipitate (Q) with 2,4-DNP reagent. Compound (P) gives a yellow precipitate (R ) when heated in the presence of iodine and NaOH along with a colourless compound (S). (P) neither reduce Tollen's reagent or Fehling's solution nor it decolourises bromine water. On drastic oxidation of (P) with chromic acid, a carboxylic acid (T) having molecular formula C_(7)H_(6)O_(2) is obtained. Deduce the structures of the compounds (P) to (T).

The equilibrium constant for, H_2(g) +CO_2(g) hArr H_2O(g) + CO(g) is 1.80 at 1000^Oc . If 1.0 mole of H_2 and 1.0 mole of CO_2 are placed in one litre flask. What will be the final equilibrium concentration of CO at 1000^Oc ?

The vapour density of undecomposed N_2O_4 is 46. When heated vapour density decreases to 24.5 due to its dissociation to NO_2 WHAT is the percent dissociation of N_2O_4 at the final stage ?

MBD PUBLICATION-EQUILIBRIUM-QUESTION BANK

The chemical reaction in which the yield of the product cannot be incr...
Text Solution
|
For which reaction is Kp = Kc :
Text Solution
|
In a flask colourless N2O4 is in equilibrium with brown colourless NO2...
Text Solution
|
For which system at equilibrium, at constant temperature, will the dou...
Text Solution
|
For which reaction Kp is less than Kc:
Text Solution
|
When NaCl3 is heated in a closed vessel, oxygen is liberated and NaNO2...
Text Solution
|
Which is a reversible reaction:
Text Solution
|
In lime kiln,the reversible reaction, CaCO3(s) hArr CaO(s)+CO2(g) proc...
Text Solution
|
In the reaction, N2(g) +3H2(g) hArr2NH3(g) increase in H2 concentratio...
Text Solution
|
For the reaction, CuSO4.5H2O(s) hArr CuSO4.3H2O(s) + 2H2O(v). Which on...
Text Solution
|
The equilibrium which remains uneffected by pressure change is :
Text Solution
|
In an equilibrium reaction if DeltaG^o = 0 the equilibrium constant, K...
Text Solution
|
Solubility of a subsatnce which dissolves with a decrease in volume an...
Text Solution
|
A chemical system is in equilibrium Addition of a catalyst would resul...
Text Solution
|
In a vessel containing SO3, SO2 and O2 at equilibrium,some helium gas ...
Text Solution
|
Concentration of reaction and products at equilibrium for A + 2B hArr ...
Text Solution
|
For a gaseous equilibrium, A +2B hArr C + 3D the partial pressures of ...
Text Solution
|
HI was heated in a sealed tube at 440^Oc till the equiibrium was reach...
Text Solution
|
The equilibrium constant for, H2(g) +CO2(g) hArr H2O(g) + CO(g) is 1.8...
Text Solution
|
An equilibrium mixture for the reaction, 2H2S(g) hArr 2H2(g) + S2(g) ...
Text Solution
|