Question

name:
campus:
science: how air conditioners make cities hotter u4l2.2
team/hk:
homework:
use the diagram to answer the questions below.

1. in which container is the heat content greatest?

1. in which two containers is the motion of molecules the same?

1. compare the motion of molecules in beaker a to beaker c.

Explanation:

Question 1

Heat content (thermal energy) depends on mass (volume, assuming same substance/density) and temperature. Formula: \( Q = mc\Delta T \) (c is specific heat, same here). Container C: 200 ml, 60°C. B: 200 ml, 30°C. A: 100 ml, 30°C. C has more volume (mass) and higher temp than B; more temp than A (same volume as B? No, A is 100ml). So C has greatest heat.

Molecular motion (kinetic energy) depends on temperature (same substance). Containers A and B have 30°C, so same temp → same molecular motion speed.

Molecular motion (kinetic energy) is proportional to temperature (higher temp → faster motion). Beaker A: 30°C, Beaker C: 60°C. So molecules in C move faster than in A.

Answer:

Container C

Question 2