Ask Question, Ask an Expert


Ask Mechanical Engineering Expert

problem 1: Define Irreversibility and the factors which cause irreversibility in the thermodynamic processes.

problem 2: A gas whose original pressure, volume and temperatures were 140 kN/m2, 0.1 m3 and 25o C respectively is compressed such that its new pressure is 700 kN/m2 and the new temperature is 60oC. Find out the new volume of the gas.

problem 3: A closed system receives 105 kJ of heat while it performs 130 kJ of work. Find out the change in internal energy.

problem 4: An input of 1 kW – hr of work into a system into a closed system increases internal energy of the system by 2000 kJ. Find out how much heat is lost from the system.

problem 5: A quantity of gas occupies a volume of 0.28 m3 at a pressure of 120 kN/m2 and a temperature of 25oC. The gas is compressed isothermally to a pressure of 600 kN/m2 and then expanded adiabatically to its initial volume. Find out:

a) Heat received or rejected during compression.

b) Mass of the gas and (c) the change in internal energy during expansion. Suppose γ = 1.4 and Cp = 1.0 kJ/kg K for this gas.

problem 6: The initial volume of 0.18 kg of a certain gas was 0.15 m3 at a temperature 15oC and pressure of 1 kg/cm2. After adiabatic compression to 0.056 m3 the pressure found to be 4 kg/cm2. Find out:

a) Ratio of specific heats.

b) Change of internal energy.

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M93723

Have any Question? 

Related Questions in Mechanical Engineering

Water flows steadily through the piping junction entering

Water flows steadily through the piping junction, entering section 1 at 0.0013 m 3  /s. The average velocity at section 2 is 2.1 m/s. A portion of the flow is diverted through the showerhead, which contains 100 holes of ...

Using the equations for stress transformationa confirm the

Using the equations for stress transformation, a. confirm the angles that define the planes of maximum and minimum shear stress b. determine the maximum and minimum values of the shear stress

The doctoral candidate phd research is entitled a critical

The Doctoral Candidate PhD research is entitled "A critical Investigation of Risk Management Practices Influence on the Pharmaceutical Supply Chain Performance" The focus of this dissertation is thus on the risk manageme ...

1 develop three scenarios for comparable circular cylinders

1. Develop three scenarios for comparable circular cylinders of radius R and square tubes of side H that allow one to say R ∼ H. (Hint: What geometric attributes of the cylinder and tube might be made equal?) 2. If a str ...

Define prying action sketch an alternative joint diagram

Define prying action? Sketch an alternative joint diagram showing the effects of prying action Name at least two things the joint designer can do to reduce prying action? This and the following three questions are all in ...

Assignmentin mse 2010 we talk about several general classes

Assignment In MSE 2010 we talk about several general classes of materials: metals, polymers, ceramics, glasses and composites. We know that these are just the basic categories and we've discussed several specific example ...

A mixture of 210 x 10-3 g of o2 388 x 10-3 mol of n2 and

A mixture of 2.10 X 10 -3 g of O2 3.88 X 10-3 mol of N 2 . And 5.25 X 10 -3 molecules of CO are placed into a vessel of volume 5.25 L at 12.5°C. a. Calculate the total pressure in the vessel. b. Calculate the mole fracti ...

1 for the pipe-flow-reducing section d1nbsp 8 cm d2nbsp 5

1. For the pipe-flow-reducing section D 1  = 8 cm, D 2  = 5 cm, and p 2  = 1 atm. If v 1  = 5 m/s and the manometer reading is h =58 cm, estimate the total force resisted by the flange bolts. 2. An open tank car as shown ...

A cubical piece of wood with an edge l in length floats in

A cubical piece of wood with an edge L in length floats in the water. The specific gravity of the wood is 0.90. What moment M is required to hold the cube in the position shown? The right-hand edge of the block is flush ...

Should a slip-critical joint be analyzed as a friction-type

Should a slip-critical joint be analyzed as a friction-type or bearing-type joint? Describe some of the applications in which slip-critical joints are mandated? What is the difference between a pretension and a slip-crit ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen