Thermo 1

Enthalpy of an ideal gas is a function only of _________.

• Entropy

• Internal energy

• Temperature

• Pressure

Which of the following is the most efficient energy cycle?

• brayton

• otto

• carnot

• diesel

What is the first law of thermodynamics?

• Internal energy is due to molecular motions

• Entropy of the universe is increase by irreversible processes

• Energy can neither be created nor destroy heat energy cannot be completely transformed into work

• None of these

An ideal gas is compressed isothermally. What is the enthalpy change?

• Always negative

• Always positive

• Zero

• Undefined

Name the process that has no heat transfer.

• Isothermal

• Isobaric

• Polytrophic

• Adiabatic

An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of the gas

• Decrease

• Increase

• Remain constant

• Is Zero

What is the Sl unit of Pressure?

• Kg/cm^2

• Dynes/cm^2

• Pascal

• Psi

The equation C_p= C_v + R applies to which of the following?

• Enthalpy

• Ideal gas

• Two phase states

• All pure substance

In the flow process, neglecting kinetic and potential energies, the integral of Vdp represents what?

• Heat transfer

• Flow energy

• Enthalpy change

• Shaft work

Mechanical energy of pressure transformed into energy of heat

• Kinetic energy

• Enthalpy

• Heat exchanger

• Heat of compression