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Biology; Chemistry; Physics: Post your doubts here!

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1) how to focus the image made by a converging lens in camera ??

2) Explain in terms of bond breaking and bond making why reaction of (some reaction) is exothermic ?? how to answer these type of Q's ??
 
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1) how to focus the image made by a converging lens in camera ??

2) Explain in terms of bond breaking and bond making why reaction of (some reaction) is exothermic ?? how to answer these type of Q's ??
Bond breaking means endothermic and bond forming means exothermic !! And thus u need to write that in this exothermic reaction the overall bond forming is greater than bond breaking so the overall reaction is exothermic and more energy is released in exothermic reactions
 
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1) how to focus the image made by a converging lens in camera ??

2) Explain in terms of bond breaking and bond making why reaction of (some reaction) is exothermic ?? how to answer these type of Q's ??
1) By adjusting the length of Lens from focus point.
2) It's exothermic because more amount of bonds are made which releases more energy than which is absorbed while bond breaking.
 
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1) how to focus the image made by a converging lens in camera ??

2) Explain in terms of bond breaking and bond making why reaction of (some reaction) is exothermic ?? how to answer these type of Q's ??
1) By adjusting the length of Lens from focus point.
2) The reaction is exothermic because the amount of energy released when making the bonds is greater than the amount of energy required when breaking them! :)

It doesn't always depend on the number of bonds but rather the energy required to break/make them :)
 
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1) how to focus the image made by a converging lens in camera ??

2) Explain in terms of bond breaking and bond making why reaction of (some reaction) is exothermic ?? how to answer these type of Q's ??

Energy Released in bond Making is greater than the energy Absorbed in bond Breaking!
 
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