Question

State whether q, w and U are positive, negative or zero in each of the following cases: (a) The
combustion of CH4 with O2 takes place in the container, but the container is in thermal contact
with a large water bath. (b) Isothermal expansion of an ideal gas. (c) Combustion of CH4 with O2
takes place in a rigid container surrounded by adiabatic wall.

Answer 1

a) q positive

w zero U negative

b) q zero w negative

C) q negative