Question

2-6 conduction station questions

• how does the water temperature in the cup change?
• the temperature of the water in the styrofoam cup (increased/decreased) by __ °c after the washers were added.
• what do you think happened to the temperature of washers?
• the temperature of the washers (increased/decreased) after they were added to the cup.

Explanation:

Ces réponses s'appuient sur le principe de conduction thermique : les rondelles, initialement plus chaudes que l'eau, transfèrent de la chaleur à l'eau. L'eau gagne de la chaleur, donc sa température augmente, tandis que les rondelles perdent de la chaleur, donc leur température diminue, jusqu'à l'équilibre thermique. La valeur numérique dépend des données expérimentales (masse, température initiale des échantillons, capacité thermique).

Answer:

1. The temperature of the water in the styrofoam cup increased by a positive value (e.g., 5 °C, depending on experimental data) after the washers were added.
2. The temperature of the washers decreased after they were added to the cup.