At a fabrication plant, a hot metal forging has a mass of 70.3 kg, and a specific heat capacity of 434 J/(kg C°). To har

[answerhappygod]

At a fabrication plant, a hot metal forging has a mass of 70.3
kg, and a specific heat capacity of 434 J/(kg C°). To harden it,
the forging is quenched by immersion in 834 kg of oil that has a
temperature of 39.9°C and a specific heat capacity of 2680 J/(kg
C°). The final temperature of the oil and forging at thermal
equilibrium is 68.5°C. Assuming that heat flows only between the
forging and the oil, determine the initial temperature in degrees
Celsius of the forging.