Large quantities of liquefied natural gas (lng) are shipped by ocean tanker. at a loading port, provision is made for vaporization of the lng so that it may be delivered to pipelines as gas. the lng arrives in the tanker at atmospheric pressure and at its normal boiling point of 113.7 k; it represents a possible heat sink for use as the cold reservoir of a heat engine. assuming eventual delivery of the natural gas as saturated vapor at the rate of 500kg/s, and assuming the availability of an adequate heat source at 3oc, what is the maximum mechanical power (in kw) obtainable from such an : on vaporization , the lng absorbs its enthalpy change of vaporization hfg of 512 kj/kg, at 113.7 k.)