the potential energy of the reactants or the potential energy of the products?
208265
DH reaction = DH products – DH reactants\n\nExample:  2A + B -- C\nDH = DH C – (2 DH A + DH B)\n\nIf DH is negative: exothermic reaction \nIf DH is positive: endothermic reaction
546010
the larger the size, the greater the surface area, the greater the reaction rate.\n\nsize is the independent variable, the rate of the reaction depends on the size, so rate is the dependent variable
173496
There is potential energy and kinetic energy.  Kinetic energy is the energy that something has from motion.  It's equation is E=1/2*m*v(squared) where m=mass and v=velocity.  For potential energy there are many forms.  Gravity E=mass*height*gravity, Electric and magnetic fields are potential energy.  And nuclear energy E=m*c(squared) which is the rest potential energy that anything with mass will have.  There is also energy from light E=h*nu, nu=frequency h=planck's constant.  There is also chemical potential energy which is the energy contained within molecules.
1012
A. Potential energy = Force * Distance\n     = (50 * 9.8) * 10\n     = 4900 J\nB. Power rating = Energy / time = 4900 / 5 = 980 Watts
97383
Enthalpy is loosely defined as the total available work potential- The heat energy (an equivalent energy converted to heat) plus the volume times the pressure.
377439
A reaction tends to be spontaneous if  it causes an increase in the entropy of the system, and/or a decrease in the enthalpy of the system \n\nBoth reactions are endothermic (increase in enthalpy) becuase of positive delta H values.\nBoth have an increase in entropy (positive delta S value for the first one, production of a gas for the second)\n\nSo I'd say statements ll and lll are true.
338554
Any chemical reaction is based on a flow of energy.  Provide more energy and you can then make the reaction faster, as the energy is more abundant to allow the compounds to react, and each molecule will then get to the proper energy level required to react at a faster rate.
365352
Correct.\nD. when delta G is positive the reaction is non-spontaneous
151213
This isn't too bad.\n\nFirst, find the enthalpy of formation for each of the reactants and products.\n\nFe2O3(cr) = -272 kJ/mol\nCO(g) = -110.525 kJ/mol\nCO2(g) = -393.509 kJ/mol\nFe = 0 kJ/mol\n\nThen add the enthalpies of formation for the reactants and subtract the enthalpies of formation for the products:\n\nFe2O3 + 3CO - (3CO2 + 2Fe)\n\n-272 kJ/mol + 3(-110.525 kJ/mol) - 3(-393.509 kJ/mol) - 2(0) = -603.575 kJ/mol - -1180.53 = -576.952 kJ/mol \n\nThat should do it.
143220
I believe u change the heat energy\n\nNo\n\nYes\n\nYes, I think\n\n?
449333
This is very simple\n\nCa+H2O -> Ca(OH)2 + H2\n\nThe reactant has\n1 atom of Ca\n1 atom of H\n2 atoms of O\n\nThe product has\n1 atom of Ca, ok\n2 atoms of H\n2 atoms of O\n\nJust put a coefficient of 2 in the water (H2O)\n\nSo the chem. eqn becomes\n\nCa+2 H2O -> Ca(OH)2 + H2\n\nThat's it.\nThe equation is already balance
375291
Use Gibbs free energy equation\n\nDeltaG=DeltaH - TDeltaS\n\nYou want Delta G to be negative so if Delta H positive then you need a greater TDeltaS \nDelta S is -25 so in order for the reaction to be spontaneous the T has to be less than zero
341245
1- find heat quantity\n Q=C*t\nQ = heat quantity of the reaction\nC= heat capacipy of calorimeter\nt=temperature increasing\n\n2- find heat of reaction \n H=(Q*1000)/(N*V)\nN = normality of acid and base\nV= volume of acid and base
376113
There is nothing in your question about the amount of energy involved with one mole of NaOH.\nWhat I meant was, for example, you have some info that says\n"the amount of energy produced when 1 mole of NaOH reacts with an acid is x J/mol..."\nthen your answer (in J) can be obtained by multiplying the number of moles you have (0.05225 mole) by the energy (x)...\n\nHope this helps :)
120806
Unless a equation is properly balanced the amount of product and reactant will not be the same, I suppose this is like a recipe where u get the proper number of ingredients(moles) and mix to together to give the you the proper number of products.
380262
Perhaps there is also a H atom at C*\n\nThen final product is\n\n(CH3)2CH-CH=CH-CH2-CH(CH3)2\n\nA dehydration reaction occurs.
336560
1. assume any basis (1 g of water) then express your answer in terms of heat/mass (J/g).  \n\n(Don't forget the to use the heat of fusion and heat of vaporization!)\n\n2. No, potential energy = mgh \n40g*40m*9.81 m/s^2 = potential energy = Q.\nThen use delT = Q/(MC)