If the vapor pressure of water is not taken into account when collecting a gas by water displacement, how would the value for your calculation of the ideal gas law constant , r, be affected? (increase, decrease or remain the same) explain your answer.

As we know that

PT = Pgas + PH2O                                                                                           and also

PV= nRT

so the R will be constant

where 

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.