We’re being asked if we can predict the sign of q as the caterpillar climbs if the caterpillar is the system.
The internal energy(ΔE or ΔU) of a system can be calculated from the heat and work of the system. The relationship between internal energy, heat, and work is shown in the following equation:
ΔU is the total change in internal energy of a system,
q is the heat exchanged between a system and its surroundings, and
w is the work done by or on the system.
The accompanying photo shows a pipevine swallowtail caterpillar climbing up a twig.
If the caterpillar is the system, can you predict the sign of q as the caterpillar climbs?