Chemistry, asked by mmmmmmmmmmmjmmmmm, 16 days ago

For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate.

The figure presents a curve plotted on a graph. The horizontal axis is labeled Time, and the time t is indicated along it. The vertical axis is labeled Temperature, in degrees Celsius, and the numbers 24 through 27, in increments of 1, are indicated. The curve begins at 25 degrees Celsius, and at first remains constant as time increases. Then the curve quickly moves upwards, then levels out as time increases, becoming constant again at 26.4 degrees Celsius when it passes through time t.
A student did an experiment to determine the specific heat capacity of a metal alloy. The student put a sample of the alloy in boiling water for several minutes, then quickly transferred the alloy into a calorimeter containing water originally at 25°C. The temperature of the water was monitored over time. The data are given in the graph above.

(a) What is the value of ΔT that the student should use to calculate the value of q, the heat gained by the water?
b) In terms of what occurs at the particulate level, explain how the temperature of the water increases after the alloy sample is added.
(c) The student claims that thermal equilibrium is reached at time t. Justify the student’s claim. In your justification, include a description of what occurs at the particulate level when the alloy and the water have reached thermal equilibrium.

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Answered by CARRYGAMING
4

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