If the enthalpy value for a reaction is negative, what does that indicate about the reaction?

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

Why are pipes bursting in the in extremely cold weather?

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.