Question

Two copper blocks, each of mass 1.74 kg, initially have
different temperatures,*t*_{1} = 18° C and
*t*_{2} = 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.

?S_{1} |
= J/K |

?S_{2} |
= 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*.

?S_{1} |
= J/K |

?S_{2} |
= J/K |

Answer #1

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