chemistry-class-12-unit-05-chapter-01-surface-chemistry-l-1-6-84owp6dfwpm

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Surface chemistry Lecture-1</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Surface chemistry</B></primary></p>
<hr>
<main>
<div style='float: left; width:100%;font-size:22px;text-align:left'>
<ul>
<li>
<p>Solid / Gas $\rightarrow$ state of matters</p>
</li>
<li>
<p>("/" represents interface & surface)</p>
</li>
<li>
<p>Body / atmosphere</p>
</li>
<li>
<p>S / L</p>
</li>
<li>
<p>S / S</p>
</li>
<li>
<p>L / G</p>
</li>
<li>
<p>L / L  ( example - oil / dispersed water )</p>
</li>
</ul>
</div>
<div style='float: right; width:0%;'>
<p><img alt="image" src="/subject-images/iitpal/image/chemistry-class-12-unit-05-chapter-01-surface-chemistry-l-1_6-84owp6dfwpm-099-0512.4.jpg"></p>
</div>
</main>
<hr>
<footer style="font-size:18px;"> <span style="color:blue">Surface chemistry</span> $\rightarrow$ Catalysis $\rightarrow$ Colloids $\rightarrow$ Example of colloids $\rightarrow$ Adsorption </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Surface chemistry Lecture-1</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Surface chemistry</B></primary></p>
<hr>
<main>
<div style='float: left; width:50%;font-size:22px;text-align:left'>
<ul>
<li>
<p>Surface area = $1 cm^2 \times 6$ faces</p>
</li>
<li>
<p>Surface area = $6cm^2$ $\times$ $10^{-4}$ $m^2$ = 6 $\times$ $10^{-8}$ $m^2$</p>
</li>
<li>
<p>Divide the cube in to many cubes of 1mm side length</p>
</li>
<li>
<p>Surface area $=1 mm^2 \times 6$  faces</p>
</li>
<li>
<p>Surface area $=6 mm^2 \times 1000$</p>
</li>
<li>
<p>Surface area $=60 cm^2+10^{-4} m^2$</p>
</li>
<li>
<p>Surface area $=6\times 10^{-3} \quad m^2$</p>
</li>
</ul>
</div>
<div style='float: right; width:50%;'>

<p><img src="https://imagedelivery.net/YfdZ0yYuJi8R0IouXWrMsA/dd3f3c39-1e30-490d-cf1f-d4000d81af00/public" width="100%"></p>
</div>
</main>
<hr>
<footer style="font-size:18px;"> <span style="color:blue">Surface chemistry</span> $\rightarrow$ Catalysis $\rightarrow$ Colloids $\rightarrow$ Example of colloids $\rightarrow$ Adsorption </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Surface chemistry Lecture-1</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Surface chemistry</B></primary></p>
<hr>
<main>
<div style='float: left; width:100%;font-size:22px;text-align:left'>
<ul>
<li>
<p>Surface area $=1 m=10^{-6} m=10^{-4} cm$</p>
</li>
<li>
<p>Surface area $=10^{-6} m \times 10^{-6} m \times 6 \times 10^{12} cubes=6m^2$</p>
</li>
<li>
<p>4 orders of magnitudes</p>
</li>
<li>
<p>$10^4 \times 10^4 \times 10^4 \text { cubes }$</p>
</li>
<li>
<p>10 nm surface area $=6m^2 \times 100=600m^2$</p>
</li>
<li>
<p>$\sim$ area of a tennis a court</p>
</li>
</ul>
</div>
<div style='float: right; width:0%;'>
<p><img alt="image" src="/subject-images/iitpal/image/chemistry-class-12-unit-05-chapter-01-surface-chemistry-l-1_6-84owp6dfwpm-199-1102.8.jpg"></p>
</div>
</main>
<hr>
<footer style="font-size:18px;"> <span style="color:blue">Surface chemistry</span> $\rightarrow$ Catalysis $\rightarrow$ Colloids $\rightarrow$ Example of colloids $\rightarrow$ Adsorption </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Surface chemistry Lecture-1</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Catalysis</B></primary></p>
<hr>
<main>
<div style='float: left; width:100%;font-size:22px;text-align:left'>
<ul>
<li>
<h4 id="heterogeneous-catalysis">Heterogeneous catalysis</h4>
</li>
<li>
<p><strong>Types of car engines</strong></p>
</li>
<li>
<p>$Car \rarr BS (II) / BS (iii) / BS (iv)……$</p>
</li>
<li>
<p><strong>(BS represent Bharat stage)</strong></p>
</li>
<li>
<p>These stickers are catalyst</p>
</li>
<li>
<p>These catalyst are  solids</p>
</li>
<li>
<p>When we burnt petrol with  addition of $CO_2$ and $H_2O$ we get</p>
</li>
<li>
<p>$CO , NO_2$ ,  unburnt hydrocarbons (exhaust gases)</p>
</li>
</ul>
</div>
<div style='float: right; width:0%;'>
<p><img alt="image" src="/subject-images/iitpal/image/chemistry-class-12-unit-05-chapter-01-surface-chemistry-l-1_6-84owp6dfwpm-2.jpg"></p>
</div>
</main>
<hr>
<footer style="font-size:18px;"> Surface chemistry $\rightarrow$ <span style="color:blue">Catalysis</span> $\rightarrow$ Colloids $\rightarrow$ Example of colloids $\rightarrow$ Adsorption </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Surface chemistry Lecture-1</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Example of colloids</B></primary></p>
<hr>
<main>
<div style='float: left; width:100%;font-size:22px;text-align:left'>
<ul>
<li>
<p>Compound (AgBr) whose length is h</p>
</li>
<li>
<p>Volume =  $h^3$</p>
</li>
<li>
<p>Fraction of surface molecules 6 $\times$ $(\frac{h}{l}$)</p>
</li>
<li>
<p>30cc/mole</p>
</li>
<li>
<p>$(\sim cm)$ macroscopic length</p>
</li>
<li>
<p>Importance of surface metal 1 in 10 million</p>
</li>
<li>
<p>10 nm 1 surface molecule for 4-5 molecules</p>
</li>
</ul>
</div>
<div style='float: right; width:0%;'>
<p><img alt="image" src="/subject-images/iitpal/image/chemistry-class-12-unit-05-chapter-01-surface-chemistry-l-1_6-84owp6dfwpm-361-2036.4.jpg"></p>
</div>
</main>
<hr>
<footer style="font-size:18px;"> Surface chemistry $\rightarrow$ Catalysis $\rightarrow$ Colloids $\rightarrow$ <span style="color:blue">Example of colloids</span> $\rightarrow$ Adsorption </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Surface chemistry Lecture-1</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Example of colloids</B></primary></p>
<hr>
<main>
<div style='float: left; width:50%;font-size:22px;text-align:left'>
<ul>
<li>
<p>S/G surface</p>
</li>
<li>
<p>L/G surface tension</p>
</li>
<li>
<p>Electronic package “white” packet</p>
</li>
<li>
<p>Particles $H_2{O}$</p>
</li>
<li>
<p>$SiO_2$ gel</p>
</li>
</ul>
</div>
<div style='float: right; width:50%;'>

<img src="https://imagedelivery.net/YfdZ0yYuJi8R0IouXWrMsA/ccc9ea48-3e83-4aac-bb30-75563c405700/public" width="100%">
</div>
</main>
<hr>
<footer style="font-size:18px;"> Surface chemistry $\rightarrow$ Catalysis $\rightarrow$ Colloids $\rightarrow$ <span style="color:blue">Example of colloids</span> $\rightarrow$ Adsorption </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Surface chemistry Lecture-1</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Adsorption</B></primary></p>
<hr>
<main>
<div style='float: left; width:100%;font-size:22px;text-align:left'>
<ul>
<li>
<p>$G + S \rarr G-S$ small bond formation</p>
</li>
<li>
<p>Heat is liberated on bond formation</p>
</li>
<li>
<p>Adsorption accompnished by liberation of heat</p>
</li>
<li>
<p>$\Delta H_{(ad)}$ is negative enthalpy of adsorption</p>
</li>
<li>
<p>$\Delta S_{(ad)}$ < 0</p>
</li>
<li>
<p>$\Delta G_{(ad)}$ = $\Delta H_{(ad)} - T\Delta S_{(ad)}$</p>
</li>
</ul>
<ul>
<li>Small bond function</li>
</ul>
</div>
<div style='float: right; width:0%;'>
<p><img alt="image" src="/subject-images/iitpal/image/chemistry-class-12-unit-05-chapter-01-surface-chemistry-l-1_6-84owp6dfwpm-494.jpg"></p>
</div>
</main>
<hr>
<footer style="font-size:18px;"> Surface chemistry $\rightarrow$ Catalysis $\rightarrow$ Colloids $\rightarrow$ Example of colloids $\rightarrow$ <span style="color:blue">Adsorption</span> </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Surface chemistry Lecture-1</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Adsorption</B></primary></p>
<hr>
<main>
<div style='float: left; width:50%;font-size:22px;text-align:left'>
<ul>
<li>Surface Coverage $\rarr$ pressure of gas above the surface</li>
</ul>
</div>
<div style='float: right; width:50%;'>

<img src="https://imagedelivery.net/YfdZ0yYuJi8R0IouXWrMsA/0eb89c3e-4dbb-41b6-f5c9-088f7f02ef00/public" width="50%">
<img src="https://imagedelivery.net/YfdZ0yYuJi8R0IouXWrMsA/1b513d4e-7c1e-4de7-b1c6-60e9e132a800/public" width="50%">
</div>
</main>
<hr>
<footer style="font-size:18px;"> Surface chemistry $\rightarrow$ Catalysis $\rightarrow$ Colloids $\rightarrow$ Example of colloids $\rightarrow$ <span style="color:blue">Adsorption</span> </footer>