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A heated copper block at 130^(@)C loses 340 J ofheat to the surroundings which are at room temperature of 32^(@)C . Calculate (i) the entropy change of the system ( copper block )(ii) the entropy change in the surrounding (iii) the total entropy changein the universe due to this process Assume that the temperature of the block and the surroundings remains constant.

Answer» <html><body><p></p>Solution :`T_("system") 130^(@)C = 130 + <a href="https://interviewquestions.tuteehub.com/tag/273-1832932" style="font-weight:bold;" target="_blank" title="Click to know more about 273">273</a> K = <a href="https://interviewquestions.tuteehub.com/tag/403-1874900" style="font-weight:bold;" target="_blank" title="Click to know more about 403">403</a> K, T _(surr) = 32^(@)C = 32 + 273 K = 305K` <br/>`q_("system") = -340 J , <a href="https://interviewquestions.tuteehub.com/tag/q-609558" style="font-weight:bold;" target="_blank" title="Click to know more about Q">Q</a> _(surr) =+ 340 J` <br/> (i) `DeltaS_("system") = (q _("system"))/(T_("system")) = ( -340J)/(403K) = - 0.84JK ^(-1) `(ii) `DeltaS_(surr) = (q_(surr))/(T_(surr))= (+340J)/(<a href="https://interviewquestions.tuteehub.com/tag/350k-308981" style="font-weight:bold;" target="_blank" title="Click to know more about 350K">350K</a>) = + 1.11 JK^(-1)` <br/> (<a href="https://interviewquestions.tuteehub.com/tag/iii-497983" style="font-weight:bold;" target="_blank" title="Click to know more about III">III</a>) `DeltaS_("total")`or `DeltaS_("system") + DeltaS_(surr) = - 0.84 + ( +1.11) JK^(-1)= 0.27 JK^(_1)`</body></html>


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