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Electromagnetic radiation (EM radiation, EMR, or light) is a form of energy released by electromagnetic processes. In physics, all EMR is referred to as light, but colloquially light often refers exclusively to visible light, or collectively to visible, infrared, and ultraviolet light.

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Heat of reaction for the decomposition of AgCl means?

The intent of the question is that the reaction: $$ \ce{Ag+} + \ce{Cl-} \rightarrow \ce{Ag} + \ce{Cl}$$ requires absorbing exactly one photon. That photon must have at least the energy required to per …
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