Find the ΔH (in kJ) for the reaction: PCl3(l)  +  Cl2(g)  →  PCl5(s)   Given: 2 P (s)  +  3 Cl2(g)  →  2 PCl3(l)                 ΔH = -640 kJ 2 P (s)  +  5 Cl2(g)  →  2 PCl5(s)                ΔH = -886 kJ

Q: What is the enthalpy change when 0.1 moles of ethanol undergoes complete combustion? The molar…

A:

Q: The standard enthalpy change for the following reaction is 986 kJ at 298 K. Ca(OH)2(9) → Ca(s) +…

A: The given reaction is  Ca(OH)2 -------> Ca(s) + O2(g) + H2(g)  Delta H = 986 kl/mol

Q: 4.78 x 10 kJ E) 1,040 kJ 51.Methanol (CH,OH) burns according to the equation 2CH,OH(I) +…

A: The given reaction is,

Q: Calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate, was used by the…

A: Given, moles of CaCO3 formed = 3.8 mol

Q: Given the thermochemical equations A(g) B(g) AH = 60 kJ %3D B(g) - C(g) AH = –140 kJ %3D find the…

A: When a thermochemical reaction is reversed , ∆H sign will be inverted . When a thermochemical…

Q: Given the standard enthalpy changes for the following two reactions (1) 4C(s) + 5H2(g)–C,H10(g) AH°…

A: If the given reaction is multiplied by 2 by two, then value of the given standard enthalpy change…

Q: There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of…

A: Given, Step 1: CaC2(s)+2H2O(g)→C2H2(g)+Ca(OH)2(s)       ∆H=-414 kJ   Step 2:…

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: Consider the following reaction: CH4 (9) + 20, (g) → CO2(9) + 2H, 0(1) AH=-891 kJ a. Calculate the…

A:

Q: Consider the following reaction: CH4 (9) + 20, (9) → CO2 (g) + 2H, O(1) AH=-891 kJ a. Calculate the…

A: We have enthalpy of combustion of methane as -891 KJ. a) we have to calculate the enthalpy change…

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

A:

Q: 1)State the First Law of Thermodynamics.

A: (1) First law of thermodynamics -  According to first law of thermodynamics " Energy can not be…

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: Given the reaction: 4 Fe(s) +302(g) → 2 Fe,03(s) A H= -1652 kJ, what is the enthalpy change when…

A: Given reaction is  4 Fe(s) + 3 O2(g) ----> 2 Fe2O3(s) ; ∆H = -1652 kJ  We need to find the…

Q: Consider these reactions, where M represents a generic metal. 2 M(s) + 6 HCl(aq) – 2 MC, (aq) + 3 Н,…

A: The reactions given are,

Q: Q10 a)The standard enthalpy change for the following reaction is -1.94×103 kJ at 298 K. 4 Mn(s) +…

A:

Q: The standard enthalpy change for the following reaction is -851 kJ at 298 K. 2 Na(s) + O2(g) +…

A:

Q: When 150 mL of 1.00 M NaOH is added to 100 mL of 1.30 M HCl in an insulated calorimeter, the…

A: To calculate the enthalpy change for the neutralization reaction, the following quantities are…

Q: Consider the decomposition of liquid benzene, C6H6 (), to gaseous acetylene, C2H2 (g) C6 H6 (1) →…

A: a) When a chemical reaction is reversed, the sign of enthalpy change of reaction also get reversed…

Q: Consider the following reactions :- C(s) + O,(g) → CO,(g) + x kJ 1 CO(g) + O2(g) – CO{(g) + y kJ 2…

A:

Q: The standard enthalpy changes for the formation of aluminum oxide and iron (III) oxide are: 3 2 Al…

A: Given equations are : 1). 2Al (s) + 32 O2 (g) ---------> Al2O3 (s) , ΔH01 = -1676 KJ  2). 2Fe (s)…

Q: Si(s) + 2 F2(g)        ΔH° =  1.61×103  kJ What is the standard enthalpy change for this reaction…

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Q: What is the enthalpy change, Delta Hrxn, for the following reaction?      2 RbI (s)  +  Cl2 (g)…

A: Enthalpy is a state function, so we determine the change of enthalpy of a reaction by subtracting…

Q: 4. A 50.0 gram piece of hot iron (specific heat = 0.451 J/g °C) was placed in a beaker of 600. grams…

A: The question is about calculating the Original Temperature of the hot iron piece using the given…

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: Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) + 02(g)→2P60(s) AH°…

A: We have to calculate the standard enthalpy change for the reaction PbO(s) + Zn(s) → Pb(s) + ZnO(s).

Q: The following two reactions are known: N2(g) + O2(g) -> 2NO(g) AH = +180.50 kJ N2(g) + 202(g) ---> A…

A:

Q: The standard enthalpy change for the following reaction is -731 kJ at 298 K. 2 N2(g) + 4 H2(g) + 3…

A: Rule : on dividing the reaction with any constant, the value of enthalpy change also gets divided by…

Q: The standard enthalpy change for the following reaction is 925 kJ at 298 K. Mg(OH)2(s) → Mg(s) +…

A: We know that Enthalpy is a state function one that depends on only the Initial state of the system…

Q: SnCl2 (k) → Sn (k) + Cl2 (g) +325.1 kJ 2 SnCl2 (k) + 2 Cl2 (g) → 2 SnCl4 (s) -372.4 kJ Using the…

A: The reaction enthalpy, ∆H, is the energy that is involved in carrying out a reaction. Energy may be…

Q: There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of…

A: Calcium carbide is widely used in the industrial preparation of acrylic acid.

Q: Calculate how much heat is released or absorbed

A: This is a dissociation reaction. In this reaction,  Molecular weight of NH3=17.031g/mol 2…

Q: Consider the following reaction: 2 Mg(s) + O2(g) --> 2 MgO(s)      ΔH = - 1204 kJ/rxn   Is this…

A: In an exothermic reaction heat is evolved in the surroundings and the container becomes hot after…

Q: The standard enthalpy change for the following reaction is -576 kJ at 298 K. 2 Na(s) + I2(s) –→ 2…

A: Given,

Q: Consider this reaction: 2CH3OH(l) +  3O2(g)  →  4H2O(l) + 2CO2(g)   ∆H = –1452.8 kJ/mol Is this…

A: Given, thermochemical equation is: 2CH3OH(l) +  3O2(g)  →  4H2O(l) + 2CO2(g)   ∆H = –1452.8 kJ/mol…

Q: State the First Law of Thermodynamics.

A:

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

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

Q: Using the equations Ca (s) + ½ O2 (g) → CaO (s) AH° = -635 kJ/mol CaO (s) + H2O (1) → Ca(OH)2 (s)…

A: Let Ca (s) + 1/2 O2 (g) → CaO (s)  ΔHo = -635 kJ/mol this be equation 1CaO (s) + H2O (l) → Ca(OH)2…

Q: Given the thermochemical equations X, + 3 Y, → 2XY, AH1 = -390 kJ %3D X, + 2Z, → 2 XZ, AH2 = -120 kJ…

A: We have to calculate the enthalpy change for given reaction.

Q: Use the following information to determine the enthalpy for the reaction shown be CHĄ(g) + H2O(g) →…

A: We have to find enthalpy of reaction.

Q: Hydrogen gas, H2 , reacts explosively with gaseous chlorine, Cl2 , to form hydrogen chloride,…

A: Given, Hydrogen gas H2 reacts explosively with gaseous chlorine Cl2. What is the enthalpy of the…

Q: 3. A 135.0 g sample of dilute hydrochloric acid is placed in a copper calorimeter with a mass of 465…

A: Q3) Given that: Mass of HCl sample = 135.0 g Mass of copper calorimeter = 465 g Specific heat…

Q: Given the standard enthalpy changes for the following two reactions: (1) 4C(s) + 5H2(g)→C„H1(g) AH°…

A: ∆H° is negative means that it is e reaction  To get equation 3 we should multiply equation 2 by 2…

Q: Calculate the energy change (in kJ) for the combustion of 62.0 grams of propane?

A: A specific heat quantity is generated on reacting any substance with O2. This heat is generally…

Q: Consider the following two reactions: N2(g) + 202(g) → 2NO2(g) AH = +88 kJ N2(g) + 202(g) → N¿0«(g)…

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: Given,

Q: A.) Given the standard enthalpy changes for the following two reactions: (1) 2Ni(s) + O2(g)2NI0(s)…

A:

Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 0.75 kJ/°C. When…

A: Given:  Calorimeter constant(C)= 0.75 KJ/°C  Mass of sample(m) = 0.412 gm  Increase in temperature…

Q: Given the standard enthalpy changes for the following two reactions: (1) 4C(s) + 5H₂(9) C4H10(g) AH°…

A: The enthalpy change is a state function and the Hess law states that the change of enthalpy in a…

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Pb(s) + O₂(g) → 2PbO(s)…

A: