During an exothermic chemical reaction, a system becomes warmer, and the chemica

Question

During an exothermic chemical reaction, a system becomes warmer, and the chemical substances undergo an increase in potential energy a system becomes warmer, and the chemical substances undergo a decrease in potential energy a system becomes cooler, and the chemical substances undergo an increase in potential energy a system becomes cooler, and the chemical substances undergo a decrease in potential energy a system becomes warmer, and additional heat is gained front the surroundings For a chemical reaction taking place at constant pressure, which one of the following is true? Delta Hsystem = (Kinetic Energy)system + (Potential Energy)system Delta Hsystem = (Kinetic Energy)system - (Potential Energy)system Delta Hsystem = Delta Esystem + P Delta Vsystem Delta Hsystem = Delta Esystem + qp When nitrogen gas reacts with hydrogen gas to form ammonia, 92.38 kJ of heat are given off for each mole of nitrogen gas consumed, under constant pressure and standard conditions. What is the correct value for the standard enthalpy reaction in the thermochemical equation below when 0.750 mol of hydrogen reacts? N2(g) + 3H2(s) rightarrow 2NH3(g) +34.5 kJ -98.3 kJ +59.2 kJ

Explanation / Answer

The right answer is: A system becomes warmer, and the chemical susbtances undergo an decrease in potential energy".

On a exothermic reaction chemical energy is released as heat, so the systems becomes warmer. And the produc (or products) generated from this reaction have less energy than the products before de reaction

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