<p>One mole of a monoatomic gas is mixed with three moles of a diatomic gas. The molecular specific heat of mixture at constant volume is&nbsp;<span class="equation">\(\frac{\alpha}{4}\)</span>&nbsp;RJ/mol K; then the value of&nbsp;<span class="equation">\(\alpha\)</span>​​​​​​​ &nbsp;will be _________. (Assume that the given diatomic gas has no vibrational mode).</p>