Statement of the first law of thermodynamics

Assignment Help Mechanical Engineering
Reference no: EM13707015

Select a correct statement of the first law of thermodynamics, and briefly explain why:

A. Heat transfer equals the work done for a process.

B. Net heat transfer equals the net work for a cycle

C. Net heat transfer equals net work plus internal energy change for a cycle.

D. Heat transfer minus work equals change in enthalpy.

Reference no: EM13707015

Questions Cloud

Reduced temperature and pressure : Is it a good approximation to consider helium at 250 kPa and 300 K as an ideal gas? Explain by considering it's reduced temperature and pressure (use Table A-2(Critical Constants)). At this temperature and pressure, how many moles of helium are in 0...
Which posed the greatest threat to a reconstructed iraq, and : On May 1, 2003, Bush declared Operation IRAQI FREEDOM a success. While the war had been easily won, the national reconstruction of Iraq posed a number of challenges. Of these challenges, which posed the greatest threat to a reconstructed Iraq,..
Key factors for the development of the usa''s economy : Industrial advancement is one of the key factors for the development of the USA's economy. Which industry trend (e.g. steel, food, sugar or electronic industry) do you think will be the most significant in the coming years and why?
Patient safety culture and health care ethics : Go to the Ashford University Library on the left menu panel of the online classroom. Search and select two scholarly and/or peer-reviewed articles within the scope of patient safety culture and/or health care ethics.
Statement of the first law of thermodynamics : Select a correct statement of the first law of thermodynamics, and briefly explain why:
Heat is supplied to the airflow : As shown in the picture, air flows through a pipe. Heat is supplied to the airflow. The air at the inlet is 200kPa and 20 C with flow velocity of 5m/s. The exiting air is 180 kPa and 40 °C. The diameter of the pipe is 0.28 m. Determine (a) the volume..
Summer at a local produce stand exhibit a linear trend : Weekly sales for watermelons over the summer at a local produce stand exhibit a linear trend. The demand for weeks 1 through 10 was 91, 94, 95, 97, 92, 101, 107, 116, 113, and 121. Calculate the forecasts for weeks 2 through 10 using Holt’s double ex..
Coefficient of kinetic friction between the tires and road : A 2-Mg car has a velocity of v1 = 100 km/h when the driver sees an obstacle in front of the car. It takes 0.7s for him to react and lock the brakes, causing the car to skid. If the car stops when it has traveled a distance of 225m, determine the coef..
Piston-cylinder device contains helium gas : A piston-cylinder device contains helium gas initially at 150 kPa, 20 degrees C, and 0.4 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  A mass of 5 kg of saturated water vapor at 300 kpa is

a mass of 5 kg of saturated water vapor at 300 kpa is heated at constant pressure until the temperature reaches 200 0c.

  Evaluate the shearing and normal stresses

Evaluate the shearing and normal stresses at points H and J located at the ends of the horizontal and vertical diameters of transverse section located 2.5 in. to the left of bearing B.

  For a product at an aql of 25 and lot size of 5000 using

for a product at an aql of 2.5 and lot size of 5000 using mil standard 105e what is the probability of going to

  A 1500 lb crate is pulled along the around at a constant

a 1500 lb crate is pulled along the around at a constant speed for a distance of 25ft using a cable that makes an andle

  Consider a large 3 cm thick stainless steel in which heat

consider a large 3 cm thick stainless steel in which heat is generated uniformly at a rate of 5106 wm3. assuming the

  A 60 g bullet moving with a speed of 500 ms strikes a 5 kg

a 60 g bullet moving with a speed of 500 ms strikes a 5 kg block moving in the same direction with a speed of 30 ms. if

  The steel has sy 400mpa determine the safety factor if the

a cylindrical tank with hemispherical ends is required to hold 150 psi of pressurized air at room temperature. the

  What is the change in entropy using the 2nd tds relation

1 k mol of n2 gas ideal is contained in a piston initially at 300k with a volume of 0.1 m3. the piston cylinder is well

  Determine for the cycle a the mass flow rate of steam

water is the working fluid in a regenerative rankine cycle with one closed feedwater heater and one open feedwater

  At 45 degrees celsius latitude the gravitational

at 45 degrees celsius latitude the gravitational acceleration as a function of elevation z above seas level is given by

  There is non uniform heat generation in the slab such that

a slab is insulated on one side and exposed to a surrounding temperature through a heat transfer coefficient on the

  What is the percentage error

One side of a right triangle is known to be 45 cm long and the opposite angle is measured as 30?, with a possible error of 1?.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd