A student arranges two blocks of copper next to each other so that they are touching. At the start of the experiment, Block 1’s temperature is 40°C, and Block 2’s temperature is 20°C. The two blocks remain in an isolated system until all heat energy is transferred. Which picture correctly shows the blocks’ ending temperatures?(1 point)
A. 50°c 50°c
B. 20°c 50°c
C. 30°c 30°c
D. 70°c 70°c
C. 30°c 30°c
are you sure
I apologize for the confusion. Since heat energy is transferred from Block 1 to Block 2 until both blocks reach thermal equilibrium, which is when their temperatures are equal, the correct answer should be:
C. 30°C 30°C
Question When you add cold milk and hot chocolate, they will slowly blend as the cooler liquid mixes with the warmer liquid. Eventually, the heat will be spread out evenly through the entire liquid. Which statement best explains why this happens?(1 point) Responses The liquids attract each other because the densities of the liquids are the same. The liquids attract each other because the densities of the liquids are the same. The molecules of the two liquids form chemical bonds to spread energy. The molecules of the two liquids form chemical bonds to spread energy. Cold liquids rise and hot liquids sink making the liquids mix. Cold liquids rise and hot liquids sink making the liquids mix. Heat always moves from areas of higher temperature to areas of lower temperature. Heat always moves from areas of higher temperature to areas of lower temperature. Skip to navigation
To determine the ending temperatures of the two blocks, we need to understand how heat energy is transferred between objects. In this case, we can assume that the heat will flow from the hotter block (Block 1 at 40°C) to the cooler block (Block 2 at 20°C) until both blocks reach the same temperature.
The correct answer would be option C. 30°C 30°C. This is because the heat will transfer from Block 1 to Block 2 until they both have the same temperature, which would be halfway between the initial temperatures of the two blocks. Therefore, they will both end up at 30°C.
To determine the ending temperatures of the two blocks of copper, we can use the principle of thermal equilibrium. This principle states that when two objects in contact with each other reach thermal equilibrium, they will have the same temperature.
In this scenario, Block 1 has an initial temperature of 40°C and Block 2 has an initial temperature of 20°C. Since the two blocks are in contact with each other and there is no external heat transfer in the isolated system, heat energy will flow from the block with a higher temperature to the block with a lower temperature.
Therefore, the correct choice would be C. 30°C 30°C. This is because, in thermal equilibrium, both blocks will reach the same temperature which is the average of their initial temperatures: (40°C + 20°C) / 2 = 30°C.