Which statement describes the way in which energy moves between a system of reacting substances and the surroundings?
A. Molecular collisions create energy that is then released into the
surroundings.
B. The potential energy of the system and its surroundings
increases.
C. Molecular collisions transfer thermal energy between the system
and its surroundings.
D. The thermal energy of the system and its surroundings increases.

What are the variables in gay-lussac’s law? pressure and volume pressure, temperature, and volume pressure and temperature volume, temperature, and moles of gas

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

The biosphere of the earth is made up of what compound? organic or inorganic?