On a PÂ–V diagram, curved lines representing processes with this property are (*)  steeper than isotherms, and correspond to isentropic processes, such as the expansion phase in a Carnot  (car-NOH)  cycle.
Laplace fixed Newton's model for the speed of sound by multiplying the pressure by a quantity named for this property to calculate the bulk modulus. This adjective describes a quantum state change in which the probability density evolves with a slowly changing Hamiltonian. In an ideal system with this property, pressure times volume raised to the power of either five-thirds or seven-fifths is constant. On a PÂ–V diagram, curved lines representing processes with this property are (*)  steeper than isotherms, and correspond to isentropic processes, such as the expansion phase in a Carnot  (car-NOH)  cycle. A process has this property if the work equals the change in internal energy, which generally occurs only if the system is insulated. For 10 points, name this type of process in which the net heat is zero.
Laplace fixed Newton's model for the speed of sound by multiplying the pressure by a quantity named for this property to calculate the bulk modulus.
adiabatic  [or  adiabatic  index]