A piston in a heat engine does 500 joules of work, and 1,400 joules of heat are added to the system. Determine the change in internal energy and explain how this example demonstrates the conservation of energy.

Molecular shape of XeOF4

N which city did the united states first drop the atomic bomb? a. moscow b. hiroshima c. nagasaki d. auschwitz

You transfer a clear liquid from a beaker into a test tube. You heat the test tube with the unknown liquid over a Bunsen burner.

Discuss ways in which efforts to protect species can lead to controversy.

Why is absolute dating more accurate than relative dating? Select one: a. Relative dating uses the half-life of an element. b. Absolute dating uses the half-life of an element. c. Relative dating compares the placement of fossils. d.

Which are the organs of the digestive system

For the separation of the unknown mixture, you are instructed to isolate the amine followed by the acid and finally the neutral. Does the order matter? If not, what other orders could be followed?

As ice melts and changes from solid to liquid, A) entropy increases. B) kinetic energy decreases. C) an exothermic reaction occurs. D) the random movement of molecules remains constant.

What volume of 0.480 m koh is needed to react completely with 15.8 ml of 0.150 m h2so4? assume the reaction goes to completion?

Which sample of water contains particles having the highest average kinetic energy?