Chemistry, 16.07.2019 17:20, gudtavosanchez19
Chemical reactions occur when molecules or atoms collide in a way that the bonds between atoms break and new bonds form. breaking the bonds of the reactants requires energy, whereas bond formation releases energy. select the true statements regarding energy changes during a reaction. reactants must collide with proper orientation and with energy greater than or equal to the activation energy for a reaction to occur. the activation energy, , of the forward reaction is the difference between the energy of the products and the energy of the transition state. if the heat of reaction, δ is positive, the energy of the products is lower than the energy of the reactants and the reaction is exothermic. when the activation energy is high, the reaction rate is fast. decreasing the temperature decreases the kinetic energy of the reactants, and the reaction goes more slowly. increasing the concentration of reactants increases the number of collisions, and the reaction goes faster. the energy of a collision between atoms or molecules must be greater than or equal to the activation energy, , for bonds to be broken.
Answers: 3
Chemistry, 21.06.2019 22:30, 20heldmadison
Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.
Answers: 1
Chemistry, 22.06.2019 00:50, justabeachbum
If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?
Answers: 1
Chemical reactions occur when molecules or atoms collide in a way that the bonds between atoms break...
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