NaCl has Debye temperature 310 K, while KCl has Debye temperature 230 K. The heat capacity of KCl is 0.038 J/mole*K at 5 K. Estimate the heat capacity of NaCl at 5 K.
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The Debye temperatures of NACl and KCl(having the same crystal structure) are 310K and 230K, respectively. The specific heat of KCl at 5K is 0.038J.mol-K. Estimate the specific heat of NaCl at 2K.
19, Your answer is partially correct. Try again. For some material, the heat capacity at constant volume Cy at 22 K is 0.81 J/mol-K, and the Debye temperature is 327 K. Estimate the heat capacity (in J/mol-K) (a) at 44 K, and (b) at 472 K. (a T6.48 J/mol-K (b) TT 7999.134 J/mol-K Click if you would like to Show Work for this question: Open Show Work
V. HEAT CAPACITY OF PLATINUM The usual expression for the Debye temperature involves the speed of sound, v. However, this result is too simplistic because there are two types of waves in the solid: transverse waves which travel at a speed of v, and longitudinal waves, which travel at a speed of vi. In general these speeds are not the same. a) [2 marks] Derive a new expression for the Debye temperature using the identity that the aver- age speed...
1. Acetone has a heat capacity at constant volume of 61.50 J/mol K at 310 K when it is in the gas phase. Consider the system where 1.500 moles of acetone is placed in an adiabatic chamber at 330.04 K. It is allowed to expand such that during the expansion the temperature drops to 288.05 K. Calculate the work done and the change in internal energy for the system. Assume the heat capacity is constant over this temperature range. (ANS:...
In the lecture we derived an expression for the heat capacity of a 3-dimensional solid. Derive a) 1 mark] Work out the density of modes in terms of wavenumber k, ie g(k)dk. b) [1 mark] Work out the density of modes in frequency space, g(w)dw. c) 12 marks] Work out the 2D Debye frequency W2 and temperature 62D in terms of the areal density PA-L2. d) [2 marks] Derive an exact expression for the total energy of vibrations U in...
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The temperature dependence of the molar heat capacity at constant pressure for Cl_2(g) in the temperature range from 298-800 K is: C_p, m(J mol^-1 K^-1) = 22.85 - 0.06543T - (1.2517 times 10^-4)T^2 + (1.1484 times 10^-7)T^3 Where T is the Kelvin temperature. Calculate the heat required to raise the temperature of 1.000 mole of Cl_2(g) from 300 K to 800 K.
Need work step by step please! Specific Heat Capacity The specific heat capacity of lead at 25°C is 1.290x10-1 J/g/K. For a 6.75x102 g sample of lead, how much energy is required to raise the temperature from 19.0°C to 31.8°C? (Assume that the heat capacity is constant over this temperature range.) 1 pts Submit Answer Tries 0/5 What is the molar heat capacity of lead? 1 pts Submit Answer Tries 0/5
38. The same calorimeter used in #37 was used to find the heat flow associated with the dissolution of 24g of NaCl in 176g of water. The observed ∆T (for both the calorimeter and the solution) was -1.6K. The calorimeter heat capacity is 60 J/K. The specific heat of the resulting NaCl solution is 3.64 J/Kg. What is the heat flow for this process? 37. To determine the heat capacity of a solution calorimeter (constant pressure calorimeter), 75.3g of...
Debye's theory of solids gives the heat capacity of a solid at temperature T to be p) Jo(e*-1)2 Write a Python function cv (T) that calculates Cv for a given value of the temperature, for a sample consisting of 1000 cubic centimeters of solid aluminum, which has a number density of -б.022 x 1028 m-3 and a Debye temperature of 428 K Use your function to make a graph of the heat capacity as a function of temperature from T-5K...