If the bonds in the reactants of figure 7-3 contained 432 kj of chemical energy and the bonds in the products contained 478 kj of chemical energy, what would be the amount of energy change during the reaction? would this energy be absorbed or released? show your work.

Although the way the curve upon the introduction of chemicals slopes downward it suggests a release, similarly the upward slope of the second picture upon the introduction of chemicals suggests a build up or absorption of said energy.

Since the products have more energy, this reaction is endothermic, meaning heat needs to be added. 

478-432=46kJ of energy absorbed.

Sorry i don’t know what to do

Stars are born within the clouds of dust and scattered throughout most galaxies. a familiar example of such as a dust cloud is the orion nebula. turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. as the cloud collapses, the material at the center begins to heat up. known as a protostar, it is this hot core at the heart of the collapsing cloud that will one day become a star. three-dimensional computer models of star formation predict that the spinning clouds of collapsing gas and dust may break up into two or three blobs; this would explain why the majority the stars in the milky way are paired or in groups of multiple stars.therefor, i would say the answer is: dust and gases contract.i hope this ! < 3