1).Write a balanced equation for the reaction of calcium phosphide,Ca3P2,withwater,H2O,forming calcium hydroxide,Ca(OH)2 and phosphine,PH3.Calculate theheat of reaction from the standard heats of formation listed below.Thencalculate the standard enthalpy change when 39.4 grams of calcium phosphide...
The parameter σ in equation (3) controls the relative weights of fit-to-data and potential energies in the overall HRMC cost function, and its value must be determined empirically. Through systematic tests of the variation in \({\chi }_{QF(Q)}^{2}\) and E with σ, we determined the...
Reaction with waterCalcium carbide will immediately have reaction upon coming across with water, generating acetylene and calcium hydroxide, which is the approach of industrial preparation of acetylene (carbide method), the reaction equation is:
The Langelier pH s equation, first described in 1936, is used to approximate the pH at which a water would be in equilibrium with CaCO 3. This equation uses typical water analyses and includes effects of non-ideal activity. The Langelier equation is used to estimate pH s for industrial ...
Equation (1) also assumes irreversible Ca binding, that is valid for τo ≪ τoff≈ 10 ms (see above). A problem of linear treatment appears when we consider how large calcium levels around the channel may be. A theoretical estimate of the ratio Co/i is 1.2 mM/pA15. The ...
The total difference in colour (ΔE) was calculated following equation (2):(2)ΔE=(ΔL∗)2+(Δa∗)2+(Δb∗)2where ΔL*, Δa*, and Δb* are the differences between the corresponding colour parameters of the sample and those of white standard (L* = 97.82, a* = −0.06,...
At intermediate growth rates the Paris equation (da/dN = A螖K m ) applies, with the value of m increasing with dec... N Knee,WJ Plumbridge - 《Fracture》 被引量: 16发表: 1984年 Influence of the Coexistence Gas and In-situ Solid Absorbent on the Decomposition of Covalent Chlorides and...
A regional primitive equation model is applied to the study of the interaction between the Gulf Stream and the deep western boundary current (DWBC) where they cross at Cape Hatteras. It is found that for a wide range of forcing parameter... Spall,A Michael - 《Journal of Physical Oceanograp...
Nitrogen-sorption isotherms were collected on micromeritics apparatus (ASAP 2020 Plus 2.00) at 77 K and specific surface area was calculated via Brunauer-Emmett-Teller (BET) equation. Scanning electron microscopy (SEM) imaging was conducted on a Thermo Scientific Helios 5 CX. Energy dispersive ...
Concentration-response relations were fitted to the Hill equation, $$I/I_{{\mathrm{max}}} = \frac{1}{{1 + \left( {\frac{{{\mathrm{EC}}_{50}}}{{\left[ {{\mathrm{Ca}}^{2 + }} \right]}}} \right)^h}}$$ (1) where I/Imax is the normalized current response, EC50 defi...