Given the following information for benzene, C6H6:   What is the enthalpy change, in kJ, when 214.2 g C6H6 gas at 134.8oC condenses and forms C6H6liquid at 47.6oC? _______kJ

Q: A 45.61 g sample of a substance is initially at 24.6 °C. After absorbing 2495 J of heat, the…

A: Mass of sample m = 45.61 gramInitial temperature T1 = 24.6 °CFinal temperature T2 = 119.5 °CHeat…

Q: Methanol, CH3OH, boils at 65°C. What is the enthalpy change during the process in which 16.0 g of…

A: Mass of liquid methanol    = 16 g specific heat of methanol  = 2.53Jg oC

Q: רPi How much heat will be released (AH) if 0.2037 mol of NH3 are mixed with 0.20 mol of O2 in the…

A:

Q: Consider the following chemical reaction:   CS2(g)  +  3Cl2(g)  --->  S2Cl2(g)  +  CCl4(g);…

A: In the given equation is △H  is negative , so the given reaction is exothermic reaction.  1 mole of…

Q: he specific heat of octane, C8H18, (l), is 2.22 J/g-K.  How many J of heat are needed to raise the…

A: heat is path function and is dependent of the path a system follows. It is an based on the concept…

Q: In the following reaction, what is the quantity of heat (in kJ) released when 6.49 moles of CH, are…

A: Given reaction: CH₄ (g) + 2 O₂ (g) → CO₂ (g) + 2 H₂O(g) Given, ∆H° = -802 kJ/mol We have to…

Q: The reaction of iron with hydrochloric acid is represented by the following thermochemical equation.…

A: Answer :-  e. 0.397(L) Volume of H2 gas produced at STP = 0.397 L…

Q: 6. A student is determining the enthalpy of solution for ammonium nitrate by adding ammonium nitrate…

A: The enthalpy of solution, or the heat of solution, is the total amount of heat energy that is…

Q: What is the final temperature when a 5.0 g sample of brass initially at 25 oC absorbs 75 J of heat?…

A:

Q: In the following reaction, what quantity in moles of CH₃OH are required to give off 6056 kJ of heat?…

A: Given thermochemical reaction equation is   2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g)  ∆H° =…

Q: Determine the enthalpy change in the following equation: 2 NH3(g) → N2(g) + 3 H2(g) AH°f NH3(g)…

A: Chemical equation for the formation of ammonia: 1/2N2  +  3/2H2  ----->  NH3   ∆Hof = -46.11…

Q: Consider the following chemical reaction: C3H4(g) + HCl (aq) ----------> C3H6Cl2(g) 412 kJ/ mole…

A:

Q: Consider the reaction B2H6(g) + 3 O2(g) → B2O3(s) + 3 H2O(g) ∆H = -2035 kJ How much heat is…

A: As the masses of both reactants are given, we need to fist find the limiting reactant. From limiting…

Q: A 0.692 g sample of glucose (C6H12O6) is burned in a bomb calorimeter. The temperature of 575g of…

A: The question is based on the concept of calorimetry. we have to calculate quantity of heat released…

Q: What quantity of heat (in kJ) will be released if 0.5389 mol of NH₃ are mixed with 0.200 mol of O₂…

A:

Q: A 57.60 g sample of a substance is initially at 22.6 °C. After absorbing 2787 J of heat, the…

A: Given  m = 57.60 g T1 = 22.6°C T2 = 182.8°C Q = 2787 J Specific heat of substances(c)=?

Q: Ethanol, C₂H5OH, is used to introduce oxygen into some blends of gasoline. It has a heat of…

A:

Q: How many moles of H₂ are required to produce -3451 kJ of heat in the following reaction? N₂ (g) + 3…

A: We have given that N2(g) + 3H2(g) -----> 2NH3(g) ∆H = -91.8KJ/mole

Q: A 1.00g sample of octane is burned in a calorimeter that contains 1.20kg of water. The temperature…

A:

Q: Consider a balloon filled with 2115 L of helium at 1.00 atm pressure and 45.5°C. The temperature of…

A:

Q: What is the AH°rxn for the reaction of gaseous ammonia and oxygen gas to form gaseous nitrogen…

A:

Q: A 36.52 g36.52 g sample of a substance is initially at 21.6 °C.21.6 °C. After absorbing 1505 J1505 J…

A: Given, mass of substance m = 36.52 g amount of heat absorbs q = 1505 J initial temperature T1 = 21.6…

Q: When one mole of C6H6 is burned, 3.27 MJ of heat is produced. When the heat from burning 6.57 g of…

A:

Q: What quantity of heat (in kJ) will be released if 0.2921 mol of NH3 are mixed with 0.200 mol of O₂…

A:

Q: How many moles of H2 are required to give off 2551 kJ of heat in the following reaction? N2 (g) + 3…

A: Heat of Rxn = -91.8 KJ/mol Q = 2551 KJ

Q: Ethylene glycol (specific heat 2.42 J/g°C) is used as a coolant in automotive engines. Calculate the…

A: specific heat capacity = 2.42 J/g°C   Mass of ethylene glycol = 3.65kg…

Q: How much heat is rel;eased to the surroundings when 5.00 g of CO2 is produced according to the…

A: The given chemical reaction is: C3H8 + 5O2 --> 3CO2 + 4H2O       ΔH = -2220 KJ/mol   The given…

Q: When a 45.0 g sample of an alloy at 100.0 °C is dropped into 100.0 g of water at 25.0 °C, the final…

A: We have 45g of  alloy at 100° C, also 100 g of water at 25°C, final temperature as 37°C , we have to…

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.