Question

a wooden bowl is at room temperature. a student pours some hot soup into the bowl, then walks away and forgets about the soup. a forgotten bowl of soup the bowl and soup are not an isolated system—energy can flow between them and the surroundings. complete the statements. - before the hot soup is poured into the bowl, there is. - just after the hot soup is poured into the bowl, there is. - after the bowl reaches thermal equilibrium with the soup, thermal energy until the bowl and the soup reach thermal equilibrium with the surroundings. do 10

Explanation:

1. Before pouring the hot soup: The bowl is at room temperature, so it's in thermal equilibrium with the surroundings (room). Thus, there is no net flow of thermal energy between the bowl and the surroundings.
2. Just after pouring hot soup: The soup is hot, and the bowl is at room temperature. There's a temperature difference between the soup and the bowl, so thermal energy flows from the soup to the bowl (heat transfer due to temperature gradient). So there is a net flow of thermal energy (from soup to bowl).
3. After bowl - soup thermal equilibrium: Now, the bowl - soup system has a temperature different from the surroundings (room, since soup was hot initially). So thermal energy will flow between this system and the surroundings until they reach thermal equilibrium. So thermal energy continues to flow (net flow towards equilibrium with surroundings).

For the first blank (before pouring): "no net flow of thermal energy (between the bowl and surroundings)"
For the second blank (just after pouring): "a net flow of thermal energy (from soup to bowl)"
For the third blank (after bowl - soup equilibrium): "continues to flow (between the bowl - soup system and surroundings)"

(Note: Since the original problem has dropdowns, but the options aren't shown, the above are the conceptual answers based on thermal physics principles. If options were like "no net thermal energy transfer", "net thermal energy transfer from soup to bowl", "net thermal energy transfer until equilibrium with surroundings" etc., these would match.)

Answer:

• Before the hot soup is poured into the bowl, there is no net flow of thermal energy (between the bowl and the surroundings).
• Just after the hot soup is poured into the bowl, there is a net flow of thermal energy (from the soup to the bowl).
• After the bowl reaches thermal equilibrium with the soup, thermal energy continues to flow (between the bowl - soup system and the surroundings) until the bowl and the soup reach thermal equilibrium with the surroundings.