Three hundred joules of heat are added to a system. The system uses 140 joules to do work.
By how much did the internal energy of the system
change?
O 140J
O 160J
0 240 J
O 440J

Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.

How to calculate voltage drop in a series circuit

Contains chemical energy. a. heat b. light c. natural gas