Answer
$m_i=64.82\ kg$
$Q_i=627\ kJ$
Work Step by Step
From tables A-11 to A-13:
Initial ($P_1=0.8\ MPa, x_1=1$): $v_1=0.02565\ m³/kg,\ u_1=246.82\ kJ/kg$
Final ($P_2=1.2\ MPa, x_2=0$): $v_2=0.0008935\ m³/kg,\ u_2=116.72\ kJ/kg$
Entering ($P_i=1.2\ MPa, T_i=36°C$): $h_i=102.34\ kJ/kg$
From $m=V/v,\ V_t=0.06\ m³$:
$m_1=2.340\ kg,\ m_2=67.16\ kg$
From the material balance:
$m_i=m_2-m_1$
$m_i=64.82\ kg$
From the energy balance:
$Q_i+m_ih_i=m_2u_2-m_1u_1$
$Q_i=627\ kJ$
