Click on the delta h changes sign whan a process is reversed button within the activity and analyze the relationship between the two reactions that are displayed. the reaction that was on the screen when you started and its derivative demonstrate that the reaction enthalpy, δh, changes sign when a process is reversed. consider the reaction b(s)+32o2(g)→b2o3(s), δh =−1270kj what will δh be for the reaction if it is reversed?

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next