A steam turbine is supplied with $550$ kg hr $1$ of steam, which is let down

from $43$ atm, $420\backslash$deg C to atmospheric pressure. Steam enters the turbine at

a velocity of $65$ m s$-1$ and exits at a point $5$ m below the inlet at a velocity

of $360$ m s$1.$ The turbine delivers shaft work at $73$ kW and the heat loss

from the turbine is $11\mathrm{.}4$ kW$.$ Calculate the specific enthalpy change of the

process.