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<h2 class="hd hd-2 unit-title">2.1.8. Video Lecture</h2>
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<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_6da1d1c3e29a41628f8d27b994b22787">Downloads and transcripts</h3>
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<h4 class="hd hd-5">Transcripts</h4>
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<a class="btn btn-link" href="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@6da1d1c3e29a41628f8d27b994b22787/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
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<p>Note</p>
<p>There's a typo in the video at minute 0:43. The correct natural gas combustion reaction formula is:</p>
<p>\(CH_4 +2O_2 -> CO_2 + 2H_2O + 8 eV\)<span style="font-size: 1em;"> </span></p>
<p>(Credits to <em>amran_ch</em> for catching it)</p>
</div>
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<h2 class="hd hd-2 unit-title">2.1.8. Required Assessment</h2>
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<p>Please answer the following questions (this assessment is not graded):</p>
<ul>
<li>Estimate the amount of U-235 required to power the largest city in your country for one day.</li>
<li>How is \(CO_2\) produced in power plants?</li>
<li>Why do nuclear power plants not generate \(CO_2\)?</li>
</ul>
</div>
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Assessment 2
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<p>If a new hydrocarbon fuel (\(C_xH_y\)) was discovered, could it be used in a power plant without emitting \(CO_2\)? To answer this question, write and balance the combustion reaction for this hypotetical fuel (e.g. determine \(n\), \(a\), \(b\), \(Product_1\) and \(Product_2\)).</p>
<p>\(C_xH_y + n\times O_2 = a\times Product_1 + b\times Product_2 + Energy\)</p>
<p>In the equation above, the \(n\) represents...</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_8828497587b5435682eca403d5dada7f_2_1">
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<input type="radio" name="input_8828497587b5435682eca403d5dada7f_2_1" id="input_8828497587b5435682eca403d5dada7f_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="8828497587b5435682eca403d5dada7f_2_1-choice_2-label" for="input_8828497587b5435682eca403d5dada7f_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_8828497587b5435682eca403d5dada7f_2_1"> \((1/6)\)
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<span class="status unanswered" id="status_8828497587b5435682eca403d5dada7f_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
</div>
</div></div>
<p>In the equation above, \(Product_1\) represents...</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 2" role="group"><div class="choicegroup capa_inputtype" id="inputtype_8828497587b5435682eca403d5dada7f_3_1">
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<input type="radio" name="input_8828497587b5435682eca403d5dada7f_3_1" id="input_8828497587b5435682eca403d5dada7f_3_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="8828497587b5435682eca403d5dada7f_3_1-choice_0-label" for="input_8828497587b5435682eca403d5dada7f_3_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_8828497587b5435682eca403d5dada7f_3_1"> \(\text{CH}_4\)
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<div class="field">
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<input type="radio" name="input_8828497587b5435682eca403d5dada7f_3_1" id="input_8828497587b5435682eca403d5dada7f_3_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="8828497587b5435682eca403d5dada7f_3_1-choice_2-label" for="input_8828497587b5435682eca403d5dada7f_3_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_8828497587b5435682eca403d5dada7f_3_1"> \(\text{CO}_2\)
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<span class="status unanswered" id="status_8828497587b5435682eca403d5dada7f_3_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
</div>
</div></div>
<p>In the equation above, \(Product_2\) represents...</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 3" role="group"><div class="choicegroup capa_inputtype" id="inputtype_8828497587b5435682eca403d5dada7f_4_1">
<fieldset aria-describedby="status_8828497587b5435682eca403d5dada7f_4_1">
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<input type="radio" name="input_8828497587b5435682eca403d5dada7f_4_1" id="input_8828497587b5435682eca403d5dada7f_4_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="8828497587b5435682eca403d5dada7f_4_1-choice_0-label" for="input_8828497587b5435682eca403d5dada7f_4_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_8828497587b5435682eca403d5dada7f_4_1"> \(\text{CO}_2\)
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<div class="field">
<input type="radio" name="input_8828497587b5435682eca403d5dada7f_4_1" id="input_8828497587b5435682eca403d5dada7f_4_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="8828497587b5435682eca403d5dada7f_4_1-choice_1-label" for="input_8828497587b5435682eca403d5dada7f_4_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_8828497587b5435682eca403d5dada7f_4_1"> \(\text{H}_2\text{O}\)
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<span id="answer_8828497587b5435682eca403d5dada7f_4_1"/>
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<span class="status unanswered" id="status_8828497587b5435682eca403d5dada7f_4_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
</div>
</div></div>
<p>In the equation above, \(a\) represents...</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 4" role="group"><div class="choicegroup capa_inputtype" id="inputtype_8828497587b5435682eca403d5dada7f_5_1">
<fieldset aria-describedby="status_8828497587b5435682eca403d5dada7f_5_1">
<div class="field">
<input type="radio" name="input_8828497587b5435682eca403d5dada7f_5_1" id="input_8828497587b5435682eca403d5dada7f_5_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="8828497587b5435682eca403d5dada7f_5_1-choice_0-label" for="input_8828497587b5435682eca403d5dada7f_5_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_8828497587b5435682eca403d5dada7f_5_1"> \(x\)
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<div class="field">
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<p>In the equation above, \(b\) represents...</p>
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<p>Could this fuel be used without creating \(CO_2\)?</p>
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