Hot combustion gases (approximated as air) enter a gas turbine at 1 MPa and 1500 K at a rate of 0.1 kg/s, and exit at 0.2 MPa and 900K. If heat is lost from the turbine to the surroundings at a rate of 15 kJ/s, calculate the power output from the gas turbine. (Ans. 45 kW).

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided