The specific heats at constant pressure of some common gases are provided as a thirdorder polynomial: �; < < < = � + �� + ��c + ��e, with units j/(mol k). for methane (ch4) the coefficients are � = 19.89, � = 5.024 × 10nc, � = 1.269 × 10no, � = −11.01 × 10nq. at a production facility, the gas in a 50-liter tank is compressed to 3,600 psi (gage) during which time the temperature rises to 200°f. how much heat in j is given off as the gas cools to room temperature? suppose the co

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater