If the standard molar enthalpy change for combustion of graphite powder is -2.48 × 10²kJ mol^-1, the amount of heat generated on combustion of 1g of graphite powder is__________ kJ. (Nearest integer)

<p>More enthalpy of combustion of graphite is -2.48 * 10² kJ/mol, that means 2.48 * 10² kJ heat generates when combustion of 1 mol graphite takes place.</p><p>So, heat generated on combustion of 1 g graphite</p><p><span class="mathml" contenteditable="false"> <math> <mrow> <mo>=</mo> <mfrac> <mrow> <mn>2</mn> <mo>.</mo> <mn>4</mn> <mn>8</mn> <mo>*</mo> <mn>1</mn> <msup> <mrow> <mn>0</mn> </mrow> <mrow> <mn>2</mn> </mrow> </msup> </mrow> <mrow> <mn>1</mn> <mn>2</mn> </mrow> </mfrac> <mi>k</mi> <mi>J</mi> </mrow> </math> </span></p><p>= 20.67 kJ</p><p>Ans. is 21 (the nearest integer)</p>

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