An aluminum rod is measured with a steel tape at 25°C. The reading is exactly 1.000 m long. Determine the steel tape measure's "reading" of the aluminum rod in the following cases. Will the "reading" be (1) more than, (2) the same as, or (3) less than 1.000 m? [Hint: A simple sketch for each case might be helpful. Both the aluminum rod and steel tape will expand or shrink as temperature changes.] [The coefficients of linear expansion for steel and aluminum are on the first page of this lab.] (a) only the steel tape is cooled to 0°C. (b) only the aluminum rod is cooled to 0°C, (c) both the steel tape and aluminum rod are cooled to 0°C, (d) only the steel tape is heated to 50°C, (e) only the aluminum rod is heated to 50°C, (f) both the steel tape and aluminum rod are heated to 50°C.
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
![Linear Expansion Page 4
EXERCISES
An aluminum rod is measured with a steel tape at 25°C. The reading is exactly 1.000 m long. Determine
the steel tape measure's "reading" of the aluminum rod in the following cases. Will the "reading" be (1)
more than, (2) the same as, or (3) less than 1.000 m?
[Hint: A simple sketch for each case might be helpful. Both the aluminum rod and steel tape will expand or
shrink as temperature changes.]
[The coefficients of linear expansion for steel and aluminum are on the first page of this lab.]
(a) only the steel tape is cooled to 0°C,
(b) only the aluminum rod is cooled to 0°C,
(c) both the steel tape and aluminum rod are cooled to 0°C,
(d) only the steel tape is heated to 50°C,
(e) only the aluminum rod is heated to 50°C,
(f) both the steel tape and aluminum rod are heated to 50°C.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F29eaf221-c72e-4b9c-a681-25e14c4a1cc7%2F6181e950-2628-44d7-9517-d1e2c4c70a8e%2Fok769xe_processed.jpeg&w=3840&q=75)
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