Answered: 27 26- 25 24- Time Temperature (°C)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

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°C25°C. The temperature of the water was monitored over time. The data are given in the graph below. (see attahced image)

a.) The student claims that thermal equilibrium is reached at time tt. 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.

Expert Solution

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Specific heat capacity of any substance is stated as the amount of the energy needed to raise the temperature of 1Kg of that substance by 1K (Kelvin). It is denoted by ‘c’ and its unit is $J K g^{- 1} K^{- 1}$ . It can be expressed in mathematical equation as:

$c = \frac{Q}{m \times ∆ T} w h e r e; c = s p e c i f i c h e a t c a p a c i t y Q = a m o u n t o f h e a t a b s o r b e d b y t h e s u b s \tan c e (J) m = m a s s o f t h e s u b s \tan c e (K g) ∆ T = r a i s e i n t e m p e r t u r e (K)$

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