a) W = positive and Q = negative
Explanation: When water flows from the lake into a river, the work is done on the system, i.e. W = positive.
W and Q will have opposite signs, i.e. Q = negative.
b) W = negative and Q = positive
Explanation: When acetic acid flows through a furnace and reacts to ketene and water, the work is done by the system, i.e. W = negative.
c) W = positive and Q = negative
Explanation: When hot milk is added to cold coffee, the heat releases, i.e. Q = negative.
1. a) ∆(KE) ≠ 0 (i.e. positive due to the flow/motion of water) and ∆(PE) = 0 (due to no change in the state of water)
b) ∆(KE) ≠ 0 (i.e. positive due to the flow/motion of acetic acid) and ∆(PE) ≠ 0 (i.e. negative, at the expense of PE, KE increases)
c) ∆(KE) = 0 (i.e. due to no flow/motion of coffee) and ∆(PE) ≠ 0 (i.e. positive, due to the change in the state of coffee)
2. a) Open system
b) Closed system (because the reaction occurs in the furnace)
c) Open system
∆U = The change in potential energy and ∆H = The change in enthalpy or total heat content of the syste.
Help Me Write My Essay - Reasons:
Best Online Essay Writing Service
We strive to give our customers the best online essay writing experience. We Make sure essays are submitted on time and all the instructions are followed.
Our Writers are Experienced and Professional
Our essay writing service is founded on professional writers who are on stand by to help you any time.
Free Revision Fo all Essays
Sometimes you may require our writers to add on a point to make your essay as customised as possible, we will give you unlimited times to do this. And we will do it for free.
We understand the frustrations that comes with late essays and our writers are extra careful to not violate this term. Our support team is always engauging our writers to help you have your essay ahead of time.
Customised Essays &100% Confidential
Our Online writing Service has zero torelance for plagiarised papers. We have plagiarism checking tool that generate plagiarism reports just to make sure you are satisfied.
24/7 Customer Support
Our agents are ready to help you around the clock. Please feel free to reach out and enquire about anything.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
HOW OUR ONLINE ESSAY WRITING SERVICE WORKS
Let us write that nagging essay.
By clicking on the "PLACE ORDER" button, tell us your requires. Be precise for an accurate customised essay. You may also upload any reading materials where applicable.
Pick A & Writer
Our ordering form will provide you with a list of writers and their feedbacks. At step 2, its time select a writer. Our online agents are on stand by to help you just in case.
Editing (OUR PART)
At this stage, our editor will go through your essay and make sure your writer did meet all the instructions.
Receive your Paper
After Editing, your paper will be sent to you via email.