An exothermic reaction is spontaneous reaction .. is correct from the following. Text Solution. View Solution. Most of the naturally occuring processes are spontaneous. Exothermic reactions associated with a decrease in entropy are spontaneous at lower temperatures. Justify on the basis of Gibbs equation In order to determine whether a reaction is spontaneous or not, it is not sufficient just to determine Δ Sm, the entropy difference between products and The Gibbs free energy of a reaction dictates where a reaction is spontaneous (-ΔG) or nonspontaneous (+ΔG). This is due to the components of the free energy equation (ΔG = ΔH -TΔS) that add up to be negative or positive. While an exothermic reaction (-ΔH) may suggest spontaneous reaction, a high temperature (T) or large entropy (ΔS) may Exothermic Reaction: When methane gas is combusted, heat is released, making the reaction exothermic. Specifically, the combustion of 1 mol 1 mol of methane releases Correct option is C) A reaction that is spontaneous and accompanied by a decrease of randomness must be exothermic. A spontaneous reaction has a negative value of ΔG. Also, the decrease in randomness means a negative value of ΔS. Since, ΔG=ΔH−TΔS, the enthalpy change will be negative. Hence, the reaction will be exothermic
Assertion: A reaction which is spontaneous and accompanied …
ΔG = ΔH − TΔS () () Δ G = Δ H − T Δ S. The spontaneity of a process, as reflected in the arithmetic sign of its free energy change, is then determined by the signs of the enthalpy and entropy changes and, in some cases, the absolute temperature. Since T is the absolute (kelvin) temperature, it can only have positive values Chemistry questions and answers. 19) Which one of the following is true? A) All spontaneous nuclear reactions are exothermic. B) There is no relationship between exothermicity and spontaneity in nuclear reactions. C) All spontaneous nuclear reactions are endothermic. D) Some spontaneous nuclear reactions are exothermic A reaction that is spontaneous and accompanied by decrease of randomness must be exothermic. Reason All exothermic reactions are accompanied by a decrease of randomness. View solution. Which of the following process involves decrease in the entropy of system? View solution Are spontaneous exothermic reactions spontaneous due to more stable products or to an increase in the entropy of the surroundings? [closed] Asked 2 years, 6
A reaction that is spontaneous and accompanied by decrease of …
Describe the dispersal of matter and energy that accompanies certain spontaneous processes. In this section, consider the differences between two types of The change in Gibbs’ free energy (ΔG) is negative, i.e., the reactants have more free energy than the products. Exergonic reactions are spontaneous reactions since they can occur without adding external energy to the system. All exothermic reactions are exergonic, but not all exergonic reactions are exothermic []. General Equation Key Points. When a chemical reaction happens, energy is transferred to or from the surroundings. When energy is transferred to the surroundings, this is called an exothermic reaction and usually Assertion (A) Order of the reaction can be zero or fractional. Reason (R) We cannot determine order from balanced chemical equation. (a) Both assertion and reason are correct and the reason is correct explanation of assertion (b) Both assertion and reason are correct, but reason does not explain assertion. (c) Assertion is correct, but reason is incorrect (d) A. Is this reaction spontaneous? Explain using your data. b. Is this reaction exothermic or endothermic? Explain using your data. c. Does this reaction result in more ordered or less ordered products? Explain using your data. Suppose some solid Ba(IO3)2 gets through the glass wool filter into the filtrate. What effect will this technique emro So the Mg combustion is actually spontaneous. Anyway, a good example of what you're looking for is the Haber process. N2 (g) + 3H2 (g) -> 2NH3 (g). This reaction is exothermic but entropy decreases because you end up with fewer molecules in the mixture of gases. So at high temperatures this reaction is non-spontaneous Yes,it is true that is the reaction is spontaneous if the temp hav . View the full answer A spontaneous process is an irreversible process and it could only be reversed by some external agents. The entropy of any system is defined as the degree of randomness in it.