It is a well-known fact that water has a higher specific heat capacity than iron. Now, consider equal masses of water and iron that are initially in thermal equilibrium. The same amount of heat flow, 300 J, is added to each. Which statement is true?

Question

BlackTom AI · Accepted Answer

Consider the problem setup: equal masses of water and iron start in thermal equilibrium. The same amount of heat, 300 J, is added to each substance. Because water has a higher specific heat capacity (c) than iron, for the same mass m the temperature change ΔT = Q/(m c) will be smaller for water and larger for iron.

Option 1: 'They are no longer in thermal equilibrium; the water is warmer.' This would require water to experience a larger temperature rise than iron, but since water has the larger specific heat, its temperature rise is actually smaller. Therefore this option is inconsistent with the physics.

Option 2: 'They remain in thermal equilibrium.' After adding the same heat to equal masses with different c-values, the two objects reach different final temperatures, so they cannot remain in equilibrium. This option is incorrect.

Option 3: 'They are no longer in thermal equilibrium; the iron is warmer.' Given ΔT_water < ΔT_iron due to water's larger c, the iron ends up warmer than the water. This aligns with the relationship ΔT ∝ 1/c for equal masses, making this option consistent with the concept.

Option 4: 'It is impossible to say without knowing the exact mass involved and the exact specific heat capacities.' Since the problem states equal masses and compares typical specific heat values (water > iron), we can deduce the qualitative outcome without needing the exact numerical masses or values. Therefore this option is not correct in context.

SPHY001 Practice Quiz - Unit 14 | LA054

It is a well-known fact that water has a higher specific heat capacity than iron. Now, consider equal masses of water and iron that are initially in thermal equilibrium. The same amount of heat flow, 300 J, is added to each. Which statement is true?

查看解析

登录即可查看完整答案

类似问题

What is the formula of the energy required to change the temperature?

Temperature of land rises more quickly than that of sea because

Question at position 38 Water will cool ________ land.the same asslower thanfaster than

By what quantity must the heat capacity of an object be divided to obtain the specific heat of that material?

Which of the following substances has the highest specific heat?

The specific heat of silver is 0.24 . How many joules of energy are needed to warm 4.37 g of silver from 25.0C to 27.5C?

How can you describe the specific heat of olive oil if it takes approximately 420 J of heat to raise the temperature of 7 g of olive oil by 30C?

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单