the coffee releases the same amount of heat energy that the milk absorbs according to the law of…
the coffee releases the same amount of heat energy that the milk absorbs according to the law of conservation of energy. which of these is true for the coffee and milk system? +q milk = +q coffee +q milk = -q coffee -q milk = -q coffee
Answer
Brief Explanations:
- Recall the sign convention for heat transfer: When a substance absorbs heat, its heat change ((Q)) is positive. When a substance releases heat, its heat change ((Q)) is negative.
- For the milk: It absorbs heat, so (Q_{\text{milk}}) is positive ((+Q_{\text{milk}})).
- For the coffee: It releases heat, so (Q_{\text{coffee}}) is negative ((-Q_{\text{coffee}})).
- According to the Law of Conservation of Energy, the heat absorbed by milk equals the heat released by coffee. So, (+Q_{\text{milk}}=-Q_{\text{coffee}}) (since the magnitude of heat absorbed by milk is equal to the magnitude of heat released by coffee, and their signs reflect absorption (positive) and release (negative) respectively).
Answer:
(+Q_{\text{milk}} = -Q_{\text{coffee}}) (the option with this expression)