We often use a spoon to cool coffee by stirring. Some of the heat is conducted from the coffee to the air by this method, but th

Question

2 years ago

6

We often use a spoon to cool coffee by stirring. Some of the heat is conducted from the coffee to the air by this method, but th

e spoon itself will cool the coffee a little. If a 12 gram aluminum teaspoon at 22 o C is placed in 175 ml of water (coffee's specific heat is close to water's) at 85 o C, what will the final temperature be? (Other factors, such as heat transfer to the air, may be ignored.)
Question 23 options:

78oC

92oC

84o C

82oC

Physics