Question

During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled by 2.00ºC . What is the rate of heat transfer from this forced convection alone, assuming blood has the same specific heat as water and its density is 1050 kg/m

Answer 1

Answer:

-293 W

Explanation:

mass = density * volume = 1050 kg/m^3   *  0.002 m^3/min = 2.1 kg/min

Heat transferred = mass * specific heat capacity * change in temperature

                            = mcΔT

                            = 2.1 kg/min * 4186 J/kg-°C * -2 °C

                            = -17 581.2 kJ/min

                            = -17 581.2 kJ/60s

                            = -293 J/s

                            =  -293 W

The negative sign shows us that the heat is being given off the blood