Write and simplify the general energy balance for each of the following processes. Begin by defining the system as closed or open, then writing the appropriate form of the general energy balance. Cancel out negligible terms and indicate what keyword/assumptions allows the term to be assumed negligible. State whether heat and work terms are positive or negative or zero. a. The contents of an agitated, sealed flask are heated from
25\deg C
to
80\deg C
.. b. An exothermic chemical reaction takes place in a closed, perfectly insulated, rigid container. c. Repeat part (b), only suppose that the reactor is isothermal rather than perfectly insulated. d. Water is pumped from the bottom of a well
20m
below the ground through a
2-cm
ID pipe, through the water heater and to your shower
1m
above the ground. The shower head has a cross-sectional area of
1cm^(2)
. Write and simplify the general energy balance for each of the following processes. Begin by defining the system as closed or open, then writing the appropriate form of the general energy balance. Cancel out negligible terms and indicate what keyword/assumptions allows the term to be assumed negligible. State whether heat and work terms are positive or negative or zero. a. The contents of an agitated, sealed flask are heated from 25oC to 80 oC.. b. An exothermic chemical reaction takes place in a closed, perfectly insulated, rigid container. c. Repeat part (b), only suppose that the reactor is isothermal rather than perfectly insulated. d. Water is pumped from the bottom of a well 20 m below the ground through a 2-cm ID pipe, through the water heater and to your shower 1 m above the ground. The shower head has a cross-sectional area of 1 cm2.