Could anyone name the enthalpy change by name AND if it is exothermic or endothermic (why it is endo or exo)

1 mol C(3)H(8)(l) to 1 mol C(3)H(8)(g)

  1. 👍
  2. 👎
  3. 👁
  1. Changing a material from a liquid to a gas is delta H vaporization or heat of vaporization. It is endothermic. Why endothermic? One must ADD energy to energize the molecules enough to overcome their attractive forces for each other and break away into the vapor form.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. chem

    a considerable amount of heat is required for the decomposition of aluminum oxide. 2Al2O3-> 4Al(s)+ 3O2(g) change in heat= 3352KJ a. what is the heat change for the formation of 1 mol of aluminum oxide from its elements? i got

  2. Chemistry

    Identify each enthalpy change by name and classify each change as exothermic or endothermic. a)1 mol C3H8 (l) ==> 1 mol C3H8 (g) b)1 mol Hg (l) ==> 1 mol Hg (s) c)1 mol NH3 (g) ==> 1 mol NH3 (l) d)1 mol NaCl(s) + 3.88kJ/mol ==> 1

  3. Chemistry

    Consider the following reaction: 2Na + Cl2  2NaCl ΔH = -821.8 kJ (a) Is the reaction exothermic or endothermic? (b) Calculate the amount of heat transferred when 5.6 g of Na reacts at constant pressure. (c) How many grams of

  4. chemistry

    For which of the reactions listed below will Gibbs free energy always be negative? A. An exothermic reaction that increases in entropy B. An endothermic reaction that decreases in entropy C. An endothermic reaction that increases

  1. Chemistry

    Which of the following reactions is exothermic? 1. Na(s) --> Na(g) 2. Na(g) --> Na+ + e- 3. Cl2(g) --> 2Cl(g) 4. Cl(g) + e- --> Cl-1 My guess is 4, but I'm not sure Here is what you do. For 1, do we think it will take energy to

  2. Chemistry

    H2 and F2 react according to the following equation, forming HF. H2(g) + F2(g)  2HF(g); H° = –271 kJ If H2(g) and F2(g) were mixed in a thermally insulated vessel, the reaction that occurred would be a. endothermic, and

  3. Chem

    Consider the reaction shown: 452 kcal + 4 PCl5 (s) ¨ P4 (s) + 10 Cl2(g) This reaction is ________ because the sign of ƒ¢H is ________. A) exothermic; neither positive nor negative B) endothermic; positive C) endothermic;

  4. Chemistry

    CaO(s) + 3C(s) > CaC2(s) + CO(g) deltaHrxn = +464.8 kJ/mol-rxn Is the reaction endothermic or exothermic? What is the enthalpy change if 10.0 g of CaO is allowed to react with an excess of carbon?


    Is this exothermic or endothermic? EXPLAIN C2H2+H2-----> C2H4 Is this exothermic or endothermic? EXPLAIN C2H2+2H2---->C2H6 Is this exothermic or endothermic? EXPLAIN C2H4+ H2 ----> C2H6

  2. Chem please help

    Which of the following correctly describes the net energy change during a reaction? A. The net change in energy is negative for endothermic reactions where energy is required. B. The net change in energy is positive for

  3. Chemistry

    The homework question is : Calculate the Delta H for the following reaction: C6H6 + O2 -> C + H2O(l) State whether the reaction is exothermic or endothermic. I'm not sure where to go with this but so far I balanced out the formula

  4. Chemistry

    Hi again, I just wanted to check something as the question/answers are vague for this test. How will an increase in temperature affect equilibrium? A. The equilibrium shifts in the direction of the endothermic reaction. B. There

You can view more similar questions or ask a new question.