Download App

PART - 1 CH - 5 Thermodynamics — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryPART - 1 CH - 5 Thermodynamics2 Marks
Question
Explain enthalpy of atomization with example.
✓

Answer

The enthalpy change caused by breaking all the bonds present in one mole of a substance, separating it into atoms and converting it into gaseous state is called atomization enthalpy.
Example :
(i) $H _2$ (g) $\rightarrow 2 H ( g ) \Delta_{ a } H ^{\ominus}=435.05 kJ mol ^{-1}$
(ii) Na (s) $\rightarrow Na$ (g) $\Delta H _{ a }^{\ominus}=108.4 kJ mol ^{-1}$

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 "2 Marks Questions" from PART - 1 CH - 5 Thermodynamics→PART - 1 CH - 5 Thermodynamics — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Give a brief account on the following:
i. $\mathrm{KO}_2$ is paramagnetic in nature.
ii. Sodium is stored under kerosene oil.
→
Hydrocarbon A (molecular formula is $C _5 H _8$ ) gave a white precipitate with ammoniacal silver nitrate. Oxidation of A with hot alkaline $KMnO _4$ gave 2-methyl propanoic acid. What is the structural formula of A?
→
Name an alkali metal carbonate which is thermally unstable and why? Give its decomposition reaction.
→
Among the elements Li, K, Ca, S and Kr, which one is expected to have the lowest first ionisation enthalpy and which one has the highest first ionisation enthalpy?
→
Give one chemical reaction to show that:
  1. Tin (II) is a reducing agent whereas lead (II) is not.
  2. Tin (II) chloride is a reducing agent.
→
1. How do the electronic configurations of the elements with $Z =107-109$ differ from one another?
2. $Rn ( Z =86)$ is the last noble gas discovered. Predict what will be the atomic number of the next noble gas to be discovered. Write its symbol.
→
What is the difference between 5.0g and 5.00g?
→
  1. Define the term redox couple. Write the practical application of redox couple.
  2. Split $2\text{K}\text{(s)}+\text{Cl}_2\text{(g)}\xrightarrow{ \ \ \ \ \ }2\text{KCl}\text{(s)}$ into oxidation and reducton half reaction.
→
What is the modern basis of atomic mass?
→
Calculate the heat of combustion of glucose from the following data:$\text{C(graphite)}+\text{O}_2(\text{g})\overrightarrow{\ \ \ \ \ }\text{CO}_2(\text{g});$ $\Delta\text{H}=-395.0\text{kJ mol}^{-1}$
$\text{H}_2(\text{g})+\frac{1}{2}\text{O}_2(\text{g})\overrightarrow{\ \ \ \ \ \ \ }\text{H}_2\text{O(l)};$ $\Delta\text{H}=-269.4\text{kJ mol}^{-1}$
$6\text{C(graphite)}+6\text{H}_2(\text{g})+\text{O}_2(\text{g})\overrightarrow{\ \ \ \ \ \ }\text{C}_6\text{H}_{12}\text{O}_6(\text{s});$ $\Delta\text{H}=-1169.8\text{kJ mol}^{-1}$
→