What is the change in temperature (in oC) when a 37 g sample of graphite (specific heat = 0.720 J/(g K)) evolves (-12.87) kJ of heat?

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: How much heat is released when 4.50 g of methane gas is burned in a constant-pressure system? (Use…

A: Assume the change in enthalpy for burning of methane gas is -891 kJ, as nothing regarding this has…

Q: Consider the following reaction. CH3OH(g)  CO(g) + 2 H2(g)    H = +90.7 kJ (a) Is the reaction…

A: As per our guidelines we can only solve first three sub-parts of a question. Please resubmit the…

Q: Given the data: Volume of 1.00 M HCI (mL) 45.0 Volume of 1.00M NAOH (mL) 50.0 Initial Temperature…

A: Enthalpy of neutralization is the enthalpy change when 1 mol of water is formed from the reaction of…

Q: 2 C4H10(g) + 13 O2(g) --> 8 CO2(g) + 10 H2O(l) change in H = -5756.84 kJ The enthalpy change during…

A: The objective of the question is to find out the mass of CO2 produced in a reaction with a given…

Q: A piece of copper at 96.9 °C is placed in a calorimeter containing 38.5 grams of water at 21.5 °C.…

A: We will equate heat lost by copper and heat gained by water and then calculate mass of cu from it.

Q: When ammonia reacts with dinitrogen oxide gas (ΔHf° = 82.05 kJ/mol), liquid water and nitrogen gas…

A: Thermodynamics is the branch of chemistry which deals with the study of heat and other forms of…

Q: A generic solid, X, has a molar mass of 59.1 g/mol. In a constant-pressure calorimeter, 15.8 g of X…

A: Given: The mass of solid X = 15.8 g The mass of water = 311 g The initial temperature of the water =…

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: 7.3) A sample of metal block at 75.5 °C was placed in 250.0 g water with the temperature of 22.5 °C.…

A:

Q: The process of dissolving ammonium nitrate,NH4NO3, in water is an endothermic process. a)what is…

A: Given Mass of ammonium nitrate = 4.40 g Mass of water = 100 g Heat absorbed by NH4NO3 = 3.30*102 J/g…

Q: When methanol, CH,OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A: CH3OH + 3/2 O2 ...> CO2 + 2H2O dH = -764 KJ Enthalpy of reaction is negative. It means combustion…

Q: (a) What is the molar heat capacity of liquid water? J/mol °C 75 (b) What is the heat capacity of…

A:

Q: When a 45.0-g alloy is heated to 100.0 °C and then added to 55.0 g of water at 25.0 °C, the final…

A:

Q: When a 8.47 g sample of sodium iodide, NaI, dissolves in 160.0 g of water in a calorimeter, the…

A: Calorimetry is based on the principle that when two substances at different temperatures are kept…

Q: 5.52(a) and (b)

A: (a) The given substance mass is 50 g, and temperature has to be rise by 10 Kelvin, which means the…

Q: piece of metal weighing 45.0 g was heated to 95.0oC, and the hot metal was added to 50.0 g of cold…

A: We know that the heat lost by the metal will be equal with the heat gained by the water.  Thus…

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

A: a. Given:

Q: A 148 g sample of an unknown metal at 74.0 oC is placed in a beaker containing 80.0 g of H2O at 25…

A: given values are - mass of water = 80.0 g  initial temperature of water = 25 oC  cH2O(l) = specific…

Q: The AH value for the reaction 2Hg(1) + 02(g) heat (kJ) is released when 43.4 g Hg is reacted with…

A: The given thermochemical equation is 2 Hg(l) +O2(g) →2 HgO(s), ∆H = - 181. 6 KJ. The amount of…

Q: The heat capacity of a bomb calorimeter was determined by burning 6.85 g of methane (energy of…

A:

Q: temperature of the calorimeter increases from 22.14°C to 26.82°C. What is the heat of combustion per…

A: #(a): Given: Initial temperature of the calorimeter, Ti = 22.25 oC  Final temperature of the…

Q: Below what temperature does the following reaction become nonspontaneous? 2 HNO3(aq) + NO(g) • 3…

A:

Q: How much did our sodium-in-water demonstration raise the temperature of water in the dessicator jar?…

A: The objective of the question is to calculate the number of moles of sodium added to the water in…

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.