Steam is used to pre$-$heat an air stream before it is fed into a combustion chamber. Steam enters the well$-$insulated heat exchanger at $415C$ and $300\mathrm{.}0$kPa and is isobarically condensed to a saturated liquid. The air enters at $45\mathrm{.}0C$ and $125\mathrm{.}0$kPa with a rate of $1050\frac{L}{s}$ and must be heated to $285\mathrm{.}0C.$ Assume air is an ideal gas with $MW=29$ and $C_p={3\mathrm{.}5}^{**}R.$

What is the flowrate of water leaving the exchanger?

flowrate:

$\frac{L}{s}$