Why is Enthalpy a state variable and Heat is not?

10 November 2018 4,444 0 View

State variables and process variables?

Hello, pressure p (intensive) and volume V (extensive) are thermodynamic state variables - independent on the way how a state was achieved. pdV =W is work and NOT a state variable, but a...

05 June 2018 3,662 24 View

Why can the photoeffect not be explained by wave-energy knocking out electrons?

Hello, the de Broglie relation says: wavelength= h/p (h=Planck const, p=momentum)....means: Lightwaves with a certain wavelength have a momentum. Then waves should set free an electron...

31 December 2017 8,756 4 View

Why can Heat not be Transformed completely into work?

04 May 2017 3,076 6 View

Final Pressure of an isochoric gas-evolving reaction ?

Hello, I got stuck in the thermodynamic problem. You place e.g. Zinc and HCl in an autoclave. Then the H2 evolvement starts.At which pressure will this isochoric reaction stop (pressure dependence...

01 February 2017 5,262 0 View

How evaporates a thin liquid film?

Hello, breathing on a cold window pane results in a thin film. The observation is: the diameter gets smaller with time and the edge is very dynamic! The center seems unchanged until the "shrinking...

01 February 2017 3,696 3 View

How do CO2 bubbles in water grow?

Hello, have a look at a glass of sparkling water or beer. When you observe it over a period of time and the initial heavy sparkling ceased you see a few stationary points, from which very tiny...

10 November 2016 1,331 3 View

Temperature dependence of citric acid solubility in water?

08 September 2016 9,717 0 View

Why is there no Citric acid "self-esterification"?

08 September 2016 8,558 3 View

Commercial Biotech Downstream Separation: Which Substances (Antibiotics, Insulin...) are intracellular (cell disruption) and which are extracellular?

06 July 2016 4,886 2 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

What kind of intervention will be relevant to increase motivation among young sport trainees?

Any suggestion on what book to read is also welcome.

03 March 2021 1,646 4 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

What element is driving the different slop in the low frequency tail?

My study consists simple corrosion inhibitors in salty brine. Right now I just fit my circuit with randles with CPE. Just wondering how the slop can given more info of the experiment. Or any...

01 March 2021 6,474 3 View

Genome-wide gene identification protocol ?

Is there any book chapter/book, webpage or research article available to understand genome-wide gene identification?

28 February 2021 8,095 1 View

Any suggestions or recommendations on a good publishing house based on the African for academic books in the field of Communication and media studies?

I am currently working on a book on Public Relations (from an African perspective) and the rationale behind the book is the fact that as instructors in this field, we borrow instances and case...

19 February 2021 2,482 2 View

Which books and review articles describe well the current state of deep reinforcement learning for the optimal control of physical processes?

I am going to treat in a lecture the application of deep reinforcement learning for the optimal control of physical processes. Therefore, I am looking for the best references. Besides the classics...

16 February 2021 1,006 6 View