Question: A gas is contained in a piston-and-cylinder system, oriented vertically. On top of the cylinder there is a mass. When the gas is heated it expands, and the mass is lifted. The energy used to lift the mass is exactly the same as the energy absorbed from the heater. What are the signs for q, w and AU, respectively? A. q = +; w = +; AU = + B. q = +; w = -;AU = 0 C. q = -; w= +;AU = 0 D. q = -; w= - ;AU = –

Question: A gas is contained in a piston-and-cylinder system, oriented vertically. On top of the cylinder there is a mass. When the gas is heated it expands, and the mass is lifted. The energy used to lift the mass is exactly the same as the energy absorbed from the heater. What are the signs for q, w and AU, respectively? A. q = +; w = +; AU = + B. q = +; w = -;AU = 0 C. q = -; w= +;AU = 0 D. q = -; w= - ;AU = –

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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