Problems

9.1 Terminology Associated with Energy Balances

*9.1.1. Convert 45.0 Btu/lb_m to the following:

a. cal/kg

b. J/kg

c. kWh/kg

d. (ft)(lbf)/lb_m

*9.1.2. Convert the following physical properties of liquid water at 0°C and 1 atm from the given SI units to the equivalent values in the listed American Engineering units:

a. Heat capacity of 4.184 J/(g)(K)                              Btu/(lb)(°F)

b. Enthalpy of –41.6 J/kg                                            Btu/lb

c. Thermal conductivity of 0.59 (kg)(m)/(s³)(K)           Btu/(ft)(hr)(°F)

*9.1.3. Convert the following quantities as specified:

a. A rate of heat flow of 6000 Btu/(hr)(ft²) to cal/(s)(cm²)

b. A heat capacity of 2.3 Btu/(lb)(°F) to cal/(g)(°C)

c. A thermal conductivity of 200 Btu/(hr)(ft)(°F) to J/(s)(cm)(°C)