Is the combustion of propane endothermic or exothermic? What is the value of the enthalpy change of the uncatalyzed reaction? Why does an exothermic reaction need activation energy? Is ice melting an endothermic reaction? How will an energy diagram look for an exothermic reaction?
When finding formulas for binary compounds, which element gives away its charge to find the formula? Explain the method to find the enthalpy of the product and the reactant in a chemical reaction. Write the net ionic equation for the reaction of aqueous solutions of sodium chloride and silver...
Calculation of Enthalpy of Reaction Example 1: Calculate the temperature change that results from adding 250 J of thermal energy to 0.50 moles of mercury. Visualize the diagram of the Heat System and Surroundings with the arrow direction going into the system. Use the formula: _q = nCmΔT_ ...
Instead, the release of energy (and hence the stability of the bond) arises from the reduction in kinetic energy due to the electrons being in a more spatially distributed (i.e. longer de Broglie wavelength) orbital compared with each electron being confined closer to its respective nucleus. I...
BB is the Spalding B number, which represents the ratio of the fuel's enthalpy change to the heat needed for vaporization. Exploring Minimum Flame Size To determine if there is a minimum size for a flame using this model, we need to examine the behavior of the flame parameters as the wic...
(1)reaction Engineering module , I uploaded the CHEMKIN thermo and transport file to set up the temperature dependent specific heat capacity, entropy, enthalpy and transport properties(include viscosity). And in the (2)laminar flow , I have to set up fluid properties(densi...
I'm honestly having a hard time to find words to answer to this... Let me see if I understand this correctly: instead of checking if the file actually existed or not and what contents it had, as the error message clearly stated that something was wrong with this file, ...
A chemist measures the energy change Delta H during the following reaction: 2NH_3 (g) to N_2(g) + 3H_2 (g) Delta H = 160 kJ Find the reaction is endothermic or exothermic. Calculate the enthalpy of reaction for the following: N...
Calculate the H3O+ corresponding to a solution with pH = 4.60. If the rate of a reaction at 20 C is 0.0400 mol/s, what is the rate at 30 C? What can change the rate of a reaction? How do you calculate bicarbonate concentration from pH? How is enthalpy used to predict whether a ...
The enthalpy of formation of H2O(l) is -285.8 kJ/mol. What is the enthalpy change if 1.62 g H2(g) reacts with 9.21g O2(g) to form H2O(l)? Please give detailed resolution. What is the enthalpy change for the reaction Fe(s) + 2Na+(aq) - Fe2+(aq) + ...