Question

In: Physics

Two copper blocks, each of mass 1.96 kg, initially have different temperatures,t1 = 17° C and...

Two copper blocks, each of mass 1.96 kg, initially have different temperatures,t1 = 17° C and t2 = 27° 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.

ΔS1 =  J/K
ΔS2 =  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 ΔS.

ΔS1 =  J/K
ΔS2 =  J/K

Solutions

Expert Solution

---------------------------------------------------------------------------------------------------

Please Up vote...Thank you.


Related Solutions

Two identical blocks of mass M = 2.60 kg each are initially at rest on a...
Two identical blocks of mass M = 2.60 kg each are initially at rest on a smooth, horizontal table. A bullet of very small mass m = 20 g (m << M) is fired at a high speed v. = 120 m/s towards the first block. It quickly exits the first block at a reduced speed of 0.40 v, then strikes the second block, quickly getting embedded inside of it. All the motion happens on the x-axis. (a) find the...
26/04/19 If two metal blocks of initially different temperatures come together and equilibrate to the same...
26/04/19 If two metal blocks of initially different temperatures come together and equilibrate to the same temperature and produce a total change in entropy of 6.2 JK^-1, what is the factor by which the number of microstates in the universe increases? Is this done using Boltzmann entropy? Also, please explain what the second law of thermodynamics is statistically based on.
A block made of copper with a mass of 0.90 kg is heated to 800°C, then...
A block made of copper with a mass of 0.90 kg is heated to 800°C, then dropped into 5.00 kg of water at 11°C. What is the total change in entropy (in J/K) of the block-water system, assuming no energy is lost by heat from this system to the surroundings? The specific heat of copper is 387 J/(kg · K), and the specific heat of water is 4,186 J/(kg · K). (Hint: note that dQ = mcdT.)
A copper block of mass 6.8 kg is originally at a temperature of 18°C and 1...
A copper block of mass 6.8 kg is originally at a temperature of 18°C and 1 atm. It is then heated to a temperature of 69°C without any change in pressure. The specific heat of copper is 387 J/(kg · °C), its density is 8.94 103 kg/m3, and the coefficient of linear expansion is 17 ✕ 10 −6 /°C. (a) Determine the work done by the copper block. J (b) How much heat energy is transferred during this process? J...
Three different blocks of Al, Cu, and Fe, each of them with a mass of 8.5...
Three different blocks of Al, Cu, and Fe, each of them with a mass of 8.5 g, 4) absorb 0.845 kJ of heat at 25°C. The specific heats of Al, Cu, and Fe are 0.900 J/g·°C, 0.385J/g·°C, and 0.444 J/g·°C, respectively. a) Which block reaches the highest temperature? b) What is that temperature (in oC)?
Part A Two substances, lead and sand, initially at different temperatures, come into contact and reach...
Part A Two substances, lead and sand, initially at different temperatures, come into contact and reach thermal equilibrium. The mass of lead is 19.2 g and its initial temperature is 57.9 ∘C. The mass of sand is 28.8 g and its initial temperature is 27.6 ∘C. What is the final temperature of both substances at thermal equilibrium? (The specific heat capacity of lead is 0.128 J/g⋅∘C; the specific heat capacity of sand is 0.84 J/g⋅∘C.) Express your answer to three...
Two blocks with different mass are attached to either end of a light rope that passes...
Two blocks with different mass are attached to either end of a light rope that passes over a light, frictionless pulley that is suspended from the ceiling. The masses are released from rest, and the more massive one starts to descend. After this block has descended a distance 1.20m , its speed is 1.50m/s . a. If the total mass of the two blocks is 16.0kg , what is the mass of the more massive block? Take free fall acceleration...
Given the mass of two blocks that collide, and the velocities of each block before and...
Given the mass of two blocks that collide, and the velocities of each block before and after the collision, be able to determine whether the collision was elastic, partially or completely inelastic, or not possible since an unnamed external force would be necessary to change the momentum, and/or kinetic energy of the system. Please explain in simplest terms and give an example using units given.
Consider two separate blocks with mass M1 and M2 on a horizontal frictionless surface, initially at rest. Both blocks are subjected to the same force of F
  Consider two separate blocks with mass M1 and M2 on a horizontal frictionless surface, initially at rest. Both blocks are subjected to the same force of F (applied horizontally) and they are pushed D meters on the surface. If M1<M2, which one of the following is wrong? A. Kinetic energy of block M1 is greater than the kinetic energy of block M2. B. Speed of block M1 is greater than the speed of block M2. C. Acceleration of block...
Two blocks, of 2.0 kg each, are attached by a string and slide down a ramp...
Two blocks, of 2.0 kg each, are attached by a string and slide down a ramp making an angle of 50° with the horizontal. Mass ?1 has a coefficient of kinetic friction of 0.60, and mass ?2 has a coefficient of kinetic friction of 0.40. 10. Find the acceleration of the blocks. 11. Find the tension in the string.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT