In the experiments shown in Figure 4a and 4b, ∆Usurroundings < 0, but ∆Tsurroundings &g...

In the experiments shown in Figure 4a and 4b, ∆Usurroundings < 0, but ∆Tsurroundings > 0. Explain how this is possible.

Figure 4a

Two subsystems, I and II, are enclosed in a rigid adiabatic enclosure. System I consists solely of the liquid in the beaker for each case. System II consists of everything else in the enclosure, and is the surroundings for system I. The liquid is heated using a flame.

Figure 4b

Two subsystems, I and II, are enclosed in a rigid adiabatic enclosure. System I consists solely of the liquid in the beaker for each case. System II consists of everything else in the enclosure, and is the surroundings for system I. The liquid is heated using a resistive coil through which an electrical current flows.