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#2917 Bangladesh Studies General Level 17855

<p>নিন্মের বিক্রিয়ার প্রমাণ বিক্রিয়া এনথালপি, ∆HR<sup>o</sup> কত? কার্বন (C) হাইড্রোজেন(H<sub>2</sub>), এবং ইথেন(C<sub>2</sub>H<sub>6</sub>) এর প্রমাণ দহন তাপ, &nbsp; ∆H<sub>C</sub><sup>o</sup> যথাক্রমে -394, -286, &nbsp;এবং -1561 KJ mol<sup>-1</sup> ।</p>

  1. A <p>∆HR<sup>o</sup>= &nbsp;-1561-(2×-394)-(3×-286) KJ mol<sup>-1</sup></p>
  2. B <p>∆HR<sup>o</sup>= (2×-394)+( 3×-286)-( -1561)</p>
  3. C <p>∆HR<sup>o</sup>= -1561+394+286 KJ mol<sup>-1</sup></p>
  4. D <p>∆HR<sup>o</sup>= -394-286+156 KJ mol<sup>-1</sup>&nbsp;</p>
Answer: A - <p>∆HR<sup>o</sup>= &nbsp;-1561-(2×-394)-(3×-286) KJ mol<sup>-1</sup></p>

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