The amount of heat that must be supplied to 35 g of oxygen at room temperature to raise its temperature by 80 ° C at constant volume is (molecular mass of oxygen is 32 and R = 8 . 3 J mol - 1 K - 1 )

Step-by-step solution

The expression for the heat supplied at constant volume, Q = n C v d T Q = m M C ν d T For oxygen, Specific heat at constant volume C v = f 2 R T = 5 2 R T ( f = Degree of freedom) Substitute the given values in the above equation. Q = 35 32 5 2 R   80 Q = 35 32 5 2 × 8 . 31   80 Q = 1817 . 812   J Q ≈ 1 . 81   kJ