To determine heat of displacement of cuso4 slon by zinc dust #12thchemistry #lab @a2zpractical991

Hello Friends, I'm Sachin Shukla and you are watching A to Z Practicals You will get all the practicals of 11th and 12th grade in this channel along with answers. That means you don't have to wander around here and there. You can print the same answer in your journal, or you can view and write it down. And you can understand this practical in a very easy way Friends, today I'm going to start Practical Number 9 of the 12th board. To determine the heat of displacement of CuSO4 by zinc By using copper sulfate and adding zinc to it, we will observe how much heat is released. Is it an exothermic reaction? Is the reaction exothermic or endothermic after adding zinc to copper sulfate solution? This is what we need to determine here As soon as we determine it, we will write down its answer. But for that, friends, we have to carry it out in practice That is Experiment No. 9 given in your 12th Chemistry Handbook So I quickly start the experiment For that, friends, I'm going to take a 0.2 molar copper sulfate solution. Which is given to you and 1 gram is going to take zinc So I quickly start the experiment. For the experiment, a polythene bottle is required. And what we have to do in this is Add 25 ml of 0.2 molar copper sulfate solution How much? 0.2 molar, 25 ml You must be seeing the first point in front of me. I'll take 25 ml here. How much is this? I will take 25 ml of copper sulfate. And what will I do inside this plastic bottle? I will transfer it. So I have measured 25 ml of copper sulfate. Now we have to measure its initial temperature. For which a thermometer will be required And friends, you know that the room temperature reading on the thermometer It can be 29 to 30 degrees Celsius here. Right now, the temperature in my room is showing 28 degrees Celsius. So initial temperature means If you place this thermometer in the copper sulfate solution And whatever its temperature may be, it will come If you measure it So that is your initial temperature. And that is your T1 What is your T1? So after leaving it for a while Whatever temperature comes, we will note it. So that is your initial temperature. So now this is doneafia So let's take it out and see the initial temperature So its initial temperature is basically 20 1, 2, 3 20 It is currently showing 26 degrees Celsius. Its initial temperature is 26 degrees Celsius. Now, friends, this is what we have to do I need to weigh 1 gram of zinc. So, friends, I have this zinc powder. Now what I will do is I will weigh 1 gram. So if you want to put anything on it Like I'm putting it here So it shows its weight. So what you have to do You have to tear it apart. Clear As soon as you tear it Its weight will be zero. Now you have to take 1 gram of zinc. So what will I do I will weigh 1 gram of zinc powder here. So basically, I will weigh 1 gram of zinc here. I have weighed 1 gram of zinc. You will also have to weigh it. And you have to transfer this 1 gram of zinc. You can see the point. You have to transfer this 1 gram of zinc. And close it here And insert this thermometer into it And you have to shake it a little So what will happen by shaking? Zinc and copper sulfate react with each other. Displaces the copper And let's see what's happening So, friends, I can see here That the temperature is rising You can't see This is basically the reaction between zinc and copper sulfate. It is an exothermic reaction. And here the temperature has risen. 2 degrees Celsius That means it has increased from 26 to 29. Sorry, it has gone up to 28. So basically the T2 that is showing here It will show you 28 I will tell you that this experiment When you put copper sulfate in it And insert the thermometer At that time the temperature was 26. And as soon as I put zinc in it 1 gram So after that, the temperature has increased by 2 degrees. Means the total T2 was our final temperature. It reached 28 degrees Celsius. So basically what we have to do now You are looking at the open chart in front of me. It's all written there. What changes do you have to make? You have to take 26 degrees Celsius instead of T1 And 28 degrees Celsius instead of T2 Later, if you want to remove delta T You will do T2 minus T1 So our 2 degrees will come And you are seeing below You just have to put the value of 2 directly into it. And you will get this reading After that, what you have to do in the end It is visible here So basically, what is happening in this reaction? Heat is evolving That is called an exothermic reaction. So, friends, if ever there is an exothermic reaction So the value of delta H Friends aren't writing negatively It means you have to put the minus sign. So many times examiners ask you Why do you put the minus sign? Because this is an exothermic reaction Heat is released in an exothermic reaction. Because you are observing that the temperature has risen by 2 degrees here And as soon as the temperature has increased by 2 degrees Friends, this is an exothermic reaction. And the sign convention here will be minus. So friends, this was practical But let me tell you, I have one more channel Chemistry Tadka You can get practical information related to fun facts. You can see the video playing next to me. I have done this kind of practical on that channel. Its name is Chemistry Tadka I will provide its link in the description of this video. So that friends, you go and go through that channel once. If you liked it, then definitely watch all the videos And share it with people Thank you for watching this practical Heat of displacement Which I did using zinc and copper sulfate If you liked it, then share it with more people And I'm going to give you all the practicals for 11th and 12th. 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