What does null mean in programming? Null represents the absence of a value or a non-existent reference. 8 How is H used in physics? In physics, H can denote enthalpy or other specific variables. 8 What precautions are needed when using null in code? Programmers need to check for null to...
How does the law of conservation of energy differ from the law of conservation of mass? In chemistry context , how do you best define the law of conservation of matter? Define the law of mass conservation in material and energy balances. ...
Enthalpy is the measure of heat of a substance or its internal energy. All reactions have an enthalpy change depending on whether they increase or...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough ...
What does the latent heat of vaporization measure? What is enthalpy of combustion? A chemist uses a coffee-cup calorimeter to neutralize completely 75.0 mL of 6.67 mol/L HCl with 75 mL of NaOH. The temperature change is 39.6 degrees Celsius. Calculate the heat of neutralization, in kJ/mol ...
Class 10 CHEMISTRY What does one mean by exothermic and end... What does one mean by exothermic and endothermic reactions? Give examples Video SolutionText SolutionVerified by ExpertsChemical reactions that release energy in the form of heat, light, or sound are called exothermic reactions ...
What does this mean: change in enthalpy of vaporization > temperature multiplied by change in entropy of vaporization? What is the condensation point of water in Kelvin? The heat of vaporization of water is 540 cal/g. How much heat is needed to change 3.07 g of water to steam? Water ...
For more information seethis articleabout the link between glass transition temperature and mechanical properties of polymers. This of course, as Enthalpy mentions, does not account for changes due to chemical or photo aging, to which PP is particularly susceptible....
Velocity Electrical Resistivity. Extensive Property: An extensive property of a system does depend on the system size or the amount of material in the system. Examples of extensive properties include: Mass Volume Entropy Enthalpy Energy Stiffness ...
1. The basic process behind this selective surface chemistry is band bending induced by the internal field of the ferroelectric material, as shown in Fig. 2. Kalinin’s work is further supported by Dunn et al. [26] who have shown that it is possible to selectively absorb biological ...
The enthalpy change for the following reaction is -891kJ: CH_4+2O_2= CO_2 + 2H_2O What is the enthalpy change when 2.50 g of methane is burned in excess oxygen? If enzymes speed up a chemical rxn, how does it lower the activation energy?