A baker touches a pie right after taking it out of the oven. Which statement best explains why the pie feels hot?
O Molecules in the skin move faster than molecules in the pie, so heat is transferred to the pie.
O Molecules in the pie move faster than molecules in the skin, so heat is transferred to the skin.
O Molecules in the skin move faster than molecules in the pie, so heat is transferred to the skin.
O Molecules in the pie move faster than molecules in the skin, s heat is transferred to the pie.

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

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.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?