Download App

Equilibrium — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEquilibrium3 Marks
Question
Following data is given for the reaction: $\text{CaCO}_3\text{(s)}\xrightarrow{ \ \ \ \ \ \ \ \ \ \ \ }\text{CaO(s)}+\text{CO}_2\text{(g)}$
$\Delta_\text{f}\text{H}^\ominus[\text{CaO}\text{(s)}]=-635.1\text{KJ mol}^{-1}$
$\Delta_\text{f}\text{H}^\ominus[\text{CO}_2\text{(g)}]=-393.5\text{KJ mol}^{-1}$
$\Delta_\text{f}\text{H}^\ominus[\text{CaCO}_3\text{(s)}]=-1206.9\text{KJ mol}^{-1}$
Predict the effect of temperature on the equilibrium constant of the above reaction.
✓

Answer

$\Delta_\text{f}\text{H}^\circ=\Delta_\text{r}\text{H}^\circ[\text{CaO}]+\Delta_\text{f}\text{H}^\circ[\text{CO}_2]-\Delta_\text{f}\text{H}^\circ[\text{CaCO}_3]$
$=[-635.1]+[-393.5]-[-1206.9]=178.3\text{KJ mol}^{-1}$
Thus, the reaction is endothermic.
Hence, according to Le Chatelier’s principle, on increasing the temperature, the equilibrium will proceed in the forward direction.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Equilibrium→Equilibrium — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions


Give the IUPAC names of the following compounds:
  1.  
  1.  
  1.  
  1.  
  1.  
  1. $\text{Cl}_2\text{CHCH}_2\text{OH}$
→
Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wavelength associated with the electron revolving around the orbit.
→
Arrange the bonds in order of increasing ionic character in the molecules: $\mathrm{LiF}, \mathrm{K}_2 \mathrm{O}, \mathrm{N}_2, \mathrm{SO}_2$ and $\mathrm{ClF}_3$.
→
In both water and dimethyl ether oxygen atom is central atom, and has the same hybridisation, yet they have different bond angles. Which one has greater bond angle? Give reason.
→
Predict the dipole moment of
1. a molecule of the type $AX _2$ having a linear geometry.
2. a molecule of the type $AX _4$ having tetrahedral geometry.
3. a molecule of the type $AX _2$ having angular geometry.
4. a molecule of the type $AX _4$ having square planar geometry.
→
Why is the entropy of a substance taken as zero at 0K? Calculate the standard Gibbs free energy change for the reaction:$\text{N}_2(\text{g})+3\text{H}_2(\text{g})\rightleftharpoons2\text{NH}_3(\text{g})$ at 298K
The value of equilibrium constant for the above reaction is $6.6 \times 10^5 \cdot\left[R=8.314 \mathrm{J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right]$
→
A neon-dioxygen mixture contains 70.6g dioxygen and 167.5g neon. If pressure of the mixture of gases in the cylinder is 25bar, what is the partial pressure of dioxygen and neon in the mixture?
→
An ideal gas is allowed to expand against a constant pressure of 2 bar from 10L to 50L in one step. Calculate the amount of work done by the gas. If the same expansion were carried out reversibly, will the work done be higher or lower than the earlier case? (Given that 1L bar = 100J)
→
The electron energy in hydrogen atom is given by $\text{E}_{\text{n}}=\frac{ (–2.18 \times 10–18 )}{\text{n}^2}\text{J}.$ Calculate the energy required to remove an electron completely from the n = 2 orbit. What is the longest wavelength of light in cm that can be used to cause this transition?
→
$BCl _3$ is trigonal planar while $AlCl _3$ is tetrahedral in dimeric state. Explain.
OR
$BCl _3$ exists as monomer whereas $AlCl _3$ is dimerised through halogen bridging. Give reason. Explain the structure of the dimer of $AlCl _3$ also.
→