When the water mixes with the powder (ammonium chloride: NH₄Cl) in the cold pack, thermal energy is absorbed from the environment. This makes the outside of the container feel cold. When you put a cold pack on your body, thermal energy is transferred from your body to the cold pack, which lowers the temperature of the area in contact with the pack. Thermal energy is always transferred from hotter areas to cooler ones.
1. Please fill in the blanks below based on the activation of the cold pack in the video. (5 points)
When the water mixes with the powder (ammonium chloride: NH₄Cl) in the cold pack, thermal energy is
from the environment. This makes the outside of the container feel
When you put a cold pack on your body, thermal energy is transferred from your body to the cold pack, which
Thermal energy is always transferred from
areas to
ones.
1 answer
1 answer