بر اساس اطلاعات جدول مقابل، ارزش سوختی کدام ماده بیشتر است؟ ($H=1\,\,\,\,\,\,\,,\,\,\,\,\,\,\,\,C=12\,\,\,\,\,\,\,\,,\,\,\,\,\,\,\,\,O=16$)
1 )
${{C}_{2}}{{H}_{2(g)}}$
2 )
${{C}_{2}}{{H}_{4(g)}}$
${{C}_{2}}{{H}_{6(g)}}$
4 )
${{C}_{2}}{{H}_{5}}O{{H}_{(l)}}$