What are the differences and similarities between sedimentary rocks and igneous rocks?

The similarities between sedimentary rocks and igneous rocks would be that both rocks are formed from minerals and the difference would be that igneous rocks are formed by cooling magma on the earth's surface and sedimentary rocks are formed from different combined sediments. 

The three similarities between these rocks are 1- they are all made up of minerals 2- they can all form sediments 3- they can all melt into magma..

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

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