Cold packs, whose temperatures are lowered when ammonium nitrate dissolves in water, are carried by athletic trainers when transporting ice is not possible. Which of the following is true of this reaction? a) ΔH < 0, process is endothermic b) ΔH > 0, process is endothermic c) ΔH > 0, process is exothermic d) ΔH < 0, process is exothermic e) ΔH = 0, since cold packs are sealed

Q: The standard enthalpy change for the following reaction is -496 kJ at 298 K. 2 K(s) + O2(g)…

A: Introduction :  We need tell the enthalpy change for the reaction when reaction get reversed . Given…

Q: Using the provided table, determine the enthalpy (in kJ/mol) for the reaction C(s) + CO₂ (g)→ 2 CO…

A:

Q: H, Pd, 100 atm heat NH, HC. cat. Pd K,co, H,0

A:

Q: Hot packs used by skiers use the crystallization of sodium acetate from a concentrated solution.…

A: Enthalpy change is defined as the amount of heat released or absorbed in a chemical reaction. It is…

Q: Given the reaction: 4 Fe(s) + 302(g) → 2 Fe203(s) A H= -1652 kJ, what is the enthalpy change when…

A: for a given reaction, 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s) enthalpy change, Δ H = -1652 KJ

Q: 3. Which of the following reactions is/are exothermic? Choose ALL that apply. a. H,(g) + Cl,(g) →…

A: A chemical reaction that is characterized by the release of energy in the form of heat or light is…

Q: Predict the sign of the enthalpy change for the following processes. Give a reason for your…

A: Hello. Since the question contains multiple subparts, the first three parts are solved. In case the…

Q: The following chemical equation, ΔΗ C (graphite, s) + 2 O2 (g) → CO2 (g) - 393. 5 kJ / mol - Is an…

A: Given reaction,         C(graphite, s)  +  2 O2(g)  →  CO2(g)    ∆H  =  - 393.5 kJ/mol

Q: The standard enthalpy change for the following reaction is 35.6 kJ at 298 K. L(s) + Cl2(g) – 2…

A:

Q: 3.88g of solid ammonium nitrate dissolves in 60.0g of distilled water in a coffee-cup calorimeter.…

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and…

Q: Upon the decomposition of baking soda, carbon dioxide is release, which causes a cake to rise while…

A:

Q: Given the chemical reaction: CHale) +5 0,g)→3 CO,) +4 H,OG) AH = -2044 kJ How much heat would be…

A: When hydrocarbons are combusted, then the large amount of heat is produced which is known as…

Q: The standard enthalpy change for the following reaction is 401 kJ at 298 K. 2 CH3OH(g)2…

A: • Given,         2 CH3OH(g) → 2C(s,graphile) +4H2(g)+O2(g),                              ∆H°=401 KJ…

Q: « 0 because the motion of the H,O molecules increases as it transitions from solid to liquid. At a…

A: ∆G                              ∆H                           ∆S…

Q: 2. Many manufactures produce hydrogen gas from methane gas, as in the reaction below. This reaction…

A: First we will calculate the number of moles in 2.50 kg and then calculate the amount of heat…

Q: The standard enthalpy change for the following reaction is -104 kJ at 298 K. 3 C(s,graphite) +4…

A:

Q: If Delta H = +32 KJ for a certain process, that process: a. is exothermic b can not occur c…

A:

Q: Is the reaction that occurs in a chemical cold pack used to ice athletic injuries  process…

A: Given:-            Is the reaction that occurs in a chemical cold pack used to ice athletic injuries…

Q: The sign of AH for the process H20(1) → H20(s) is: O negative, the process is exothermic O positive,…

A: The change in enthaply which is accompanies a chemical reaction, is called he enthalpy of the…

Q: a. For an exothermic process, what is the sign of ΔSsurr? b. For an exothermic process, what is the…

A: a.)delta S of surroundings is greater than zero because an exothermic reaction is releasing energy.…

Q: An ideal gas expands against a constant external pressure of 2.0 atm from 20 L to 40 L and absorbs…

A:

Q: For items 4-5. Identify if the reaction is exothermic or endothermic. 4. At 0°C and a pressure of 1…

A: Exothermic reactions are those reactions in which heat is released. The value of heat change is…

Q: The standard enthalpy change for the following reaction is -479 kJ at 298 K.

A: 1) Heat energy change at constant temperature and pressure is called enthalpy change (or) Heat of a…

Q: The standard enthalpy change for the following reaction is-135 kJ at 298 K. C(s,graphite) + 2…

A: Given : standard enthalpy for reaction  C(s) + 2 Cl2 (g) = CCl4 (l) is = - 135 KJ To find : standard…

Q: Consider the following reaction at 25 °C: 5 SO₃(g) + 2 NH₃(g) → 2 NO(g) + 5 SO₂(g) + 3 H₂O(g) a)…

A: The standard enthalpy of the reaction is equal to the difference between the enthalpy of product and…

Q: Using the provided table, determine the enthalpy for the reaction 2 K(s) + 2 H₂O(l) → 2 KOH (aq) +…

A: The change in enthalpy of a reaction is calculated as follows,                            ∆H =…

Q: Magnesium reacts with hydrochloric acid to produce hydrogen gas. ΔH°f for HCl(aq) = –167.16 kJ/mol…

A: Given: ∆Hf° HCl(aq) = -167.16 kJ/mol ∆Hf° MgCl2= - 801.17 kJ/mol

Q: (a) FeCl, NABH., ELOH (b) then H,O* КОН (c) OMe H,0 Br heat (d) NaOCH; heat (e) NBS, AIBN heat (f)…

A:

Q: The standard enthalpy change for the following reaction is -467 kJ at 298 K. Na(s) + 1/2 N2(g) + 3/2…

A:

Q: Which of the following processes is endothermic?     a hot cup of soup (system) cools on a…

A: Answer:- this question is answered by using the simple concept of endothermic reaction in which heat…

Q: when is the process endo thermic or exothermic! *71f the energy change is sio KJ -7 it the energy…

A:

Q: what is the enthalpy change for the reaction Ba Halg) +30al9) 7 B,03(5) +3H,041) AH=? a.) -239 HJ…

A: The balanced reaction taking place is given as, =&gt; B2H6 (g) + 3 O2 (g) ----------&gt; B2O3 (s) +…

Q: Work is done on the system and heat is absorbed by the system. What are the signs on heat and work?…

A: Solution: According to the IUPAC sign conversation, work done (W) by system means there is decrease…

Q: The standard enthalpy change for the following reaction is 657 kJ at 298 K. SiCl4(g) →→→ Si(s) + 2…

A: Given -&gt; SiCl4(g) ------&gt; Si(s) + 2Cl2(g).       ∆H°= 657 KJ  T = 298 K

Q: Which of the following has an heat of formation equaling zero? A) H B) N C) O D) F₂ E) None of the…

A: The standard heat of formation of an element is equal to 0 when it is present in its elemental…

Q: (7.6) Aluminum oxide decomposes to aluminum and oxygen gas by the following reaction. Al2O3(s)…

A:

Q: Given the reaction: 4 Fe(s) +302(g) → 2 Fe203(s) A H= -1652 kJ, what is the enthalpy change when…

A: The amount of energy released from the reaction is called the enthalpy of the reaction. When the…

Q: 3. For which of the following statements is correct for the reaction 2NO2(g)→H2(g)+202(g)+66.4kJ A.…

A: In this reaction the sign convention of change in enthalpy is positive which means the energy is…

Q: Is a sparkler burning  process exothermic or endothermic? Indicate the sign of ∆H.

A: Is a sparkler burning  process exothermic or endothermic has to be given,

Q: g/mol 2. When 4.98 g of NaOH was dissolved in 49.72 g of water in a calorimeter at 23.7°C, the…

A: Question 2 :- When a 4.98 g of NaOH was dissolved in 49.72 g of water in a calorimeter at 23.7°C…

Q: The standard enthalpy change for the following reaction is -111 kJ at 298 K. C(s,graphite) + 1/2…

A: For the given reaction, the standard enthalpy change at 298 K is -111 kJ. C (s) + 1/2 O2  (g)  →…

Q: The reaction which occurs in the catalytic converters of some automobiles is 2CO(g) + 2NO(g) → N2(g)…

A:

Q: Which of the following statements is incorrect concerning the thermochemical equation below? 2SO_3…

A: The given reaction is :2 SO3 (g) → 2 SO2 (g) + O2 (g) ; ∆H° = 198 kJa. the enthalpy of the reactants…

Q: A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide. 2…

A: Given :-  2 HgO(s) 2 Hg(l) + O2(g)  Hrxn = 181.6 kJ  To calculate :-  Heat require to decompose 546…

Q: The standard enthalpy change for the following reaction is 2.44×103 kJ at 298 K. 2 BaCO3(s)---&gt;2…

A: Given: 2 BaCO3(s) → 2 Ba(s) + 2 C(s, graphite) + 3 O2(g)     ΔH° = 2.44×103kJ  ----eqn(1)

Q: How much heat is released at constant pressure if 12.3 mL of 0.161 M silver nitrate is mixed with…

A: Given,  AgNO3(aq) + KCl(aq)  ➝ AgCl(s) + KNO3(aq) ∆H° = -65.5 kJ Here (-) sign indicate the release…

Q: The standard enthalpy change for the following reaction is -467 kJ at 298 K. Na(s) + 1/2 N2(g) + 3/2…

A: Given,

Q: What quantity of heat is liberated by the reaction of 0.403 mol of oxygen gas? For the reaction…

A: Given:  Moles of oxygen used = 0.403 moles  Chemical equation:  H2 (g). + 1/2 O2 (g)  -----&gt; H2O…

Q: Q1. Describe the change in temperature in diagram A and diagram B. Q2. Interpret AE 0. When do we…

A: In diagram A, the heat energy is released from the system In diagram B, the heat energy is absorbed…