Question

Two copper blocks, each of mass 1.74 kg, initially have different temperatures,t1 = 18° C and...

Two copper blocks, each of mass 1.74 kg, initially have different temperatures,t1 = 18° C and t2 = 30° C. The blocks are placed in contact with each other and come to thermal equilibrium. No heat is lost to the surroundings.
(a) Find the final temperature of the blocks.
°C

Find the heat transferred between them.
J

(b) Find the entropy change of each block during the time interval in which the first joule of heat flows.

?S1 = J/K
?S2 = J/K


(c) Estimate the entropy change of each block after it has reached thermal equilibrium. Use each block's average temperature during the process in calculating the estimated values of ?S.

?S1 = J/K
?S2 = J/K

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Consider an isolated system containing two blocks of copper with equal mass. One block is initially...
Consider an isolated system containing two blocks of copper with equal mass. One block is initially at 0oC while the other is at 100oC.They are brought into contact with each other and allowed to thermally equilibrate. What is the entropy change for the system during this process? The heat capacity for copper is Cp = 24.5 [J/mol k]
Two identical bars, each of mass m and specific heat c, are initially kept at temperatures...
Two identical bars, each of mass m and specific heat c, are initially kept at temperatures T0and 5T0respectively. The bars are brought into contact until equilibrium is established. Assuming the entire experiment took place in thermal insulation from the surroundings; find the entropy change of the system.
Two solid bodies of equal mass and identical composition, isolated from the surroundings and each other...
Two solid bodies of equal mass and identical composition, isolated from the surroundings and each other and kept initially at temperature T1 and T2 are brought into thermal contact until they attain thermal equilibrium with each other. Compute the amount of entropy change of the universe in terms of T1, T2, and the heat capacity C_p of each body , assuming the process to take place at constant pressure exerted on them by the environment and show that the entropy...
Consider two blocks. The initial temperature of block 1 is 280 K and the initial temperature...
Consider two blocks. The initial temperature of block 1 is 280 K and the initial temperature of block 2 is 340 K. The heat capacities of blocks 1 and 2 are 400 J/K and 200 J/K, respectively. A. The two blocks are placed in thermal contact with one another but are perfectly insulated from the remainder of their surroundings. We will call the process that begins when the blocks are brought in contact with one another process A. Determine the...
A 1.05 kg block of copper at 100°C is placed in an insulated calorimeter of negligible...
A 1.05 kg block of copper at 100°C is placed in an insulated calorimeter of negligible heat capacity containing 3.50 L of liquid water at 0.0°C. (a) Find the entropy change of the copper block. J/K (b) Find the entropy change of the water. J/K (c) Find the entropy change of the universe. J/K
A block of copper has a mass of 100 kg and an initial temperature of 900...
A block of copper has a mass of 100 kg and an initial temperature of 900 K. Copper can be modeled as an incompressible substance with a specific heat capacity of 0.4 kJ/kg-K. a.) The copper block is dropped into a large lake at 300 K and allowed to come to thermal equilibrium. How much entropy is generated (kJ/K)? b.) If a reversible heat engine were connected between the lake and the copper block and operated until the temperature of...
Ideal gas ethylene undergoes a reversible adiabatic compression by which its temperature increases from T1 =...
Ideal gas ethylene undergoes a reversible adiabatic compression by which its temperature increases from T1 = 300 K to T2 = 450 K. The molar entropy in the initial state is given as s1 = 100 J K–1 mol–1, and here, for ethylene, cp = ?T + c0 with ? = 0.1 J K–2 mol–1 and c0 = 13.1 J K–1 mol–1. Determine the change of the molar entropy s2 – s1 and the change of the chemical potential ?2...
A 59-kg iron block and a 20-kg copper block, both initially at 80°C, are dropped into...
A 59-kg iron block and a 20-kg copper block, both initially at 80°C, are dropped into a large lake at 15°C. Thermal equilibrium is established after a while as a result of heat transfer between the blocks and the lake water. Assuming the surroundings to be at 20°C, determine the amount of work that could have been produced if the entire process were executed in a reversible manner. The specific heats of iron and copper are 0.45 kJ/kg·K and 0.386...
A 41.6 g block of copper whose temperature is 372 K is placed in an insulating...
A 41.6 g block of copper whose temperature is 372 K is placed in an insulating box with a 59.3 g block of lead whose temperature is 146 K. (a) What is the equilibrium temperature of the two-block system? (b) What is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c)What is the change in the entropy of the two-block system? The heat capacities of copper and lead are 386...
A 16.2 g block of copper whose temperature is 417 K is placed in an insulating...
A 16.2 g block of copper whose temperature is 417 K is placed in an insulating box with a 122 g block of lead whose temperature is 103 K. (a) What is the equilibrium temperature of the two-block system? (b) What is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) What is the change in the entropy of the two-block system? The heat capacities of copper and lead are...