A sheet of gold weighing 10.6 g and at a temperature of 15.3°C is placed flat on a sheet of iron weighing 21.2 g and at a temperature of 52.6°C. What is the final temperature of the combined metals? Assume that no heat is lost to the surroundings. °C

Q: A 75.0 gram piece of titanium is heated to a temperature of 98.40ºC. The metal is then dropped into…

A: Write the expression of heat change due to the change in temperature. ∆H=ms∆t Where ∆H is the heat…

Q: A 12.3 g chunk of metal is heated up to 95°C and  dropped into an insulated vessel containing 157 g…

A: The question is based on the concept of law of conservation of energy . whatever heat lost by the…

Q: A sample of lead is heated to 189.4oC.  It is then placed in a cup containing 32.8 g water at…

A: The relationship between heat , specific heat capacity and change in temperature is given by the…

Q: 39.0 g sample of a metal is heated to 63.0 °C and then dropped into 125.0 g of water in a…

A: Heat absorbed by the substance = m x Cs x ∆T  m = mass of substance Cs = specific heat capacity of…

Q: 0.810-g piece of lithium metal is dropped into a mixture of 50.0 g ater and 50.0 g ice, both at 0°C.…

A: The moles of Li can be calculated as,mass of lithium, Li = 0.870 gMolar mass of Li= 6.941 g/molMoles…

Q: A piece of calcite is heated to 72.0°C and placed in a styrofoam coffee cup containing 25.0 mL of…

A: GIVEN: The temperature of Calcite=72.0°C Volume of water= 25.0 mL The initial temperature of water=…

Q: A 15.24-g piece of the metal is heated to 75.15 oC and placed in an insulated cup containing 50.00…

A:

Q: To treat a burn on his hand, a person decides to place an ice cube on the burned skin. The mass of…

A:

Q: A piece of titanium metal with a mass of 24.8 g is heated in boiling water to 99.5 °C and then…

A: Given that: mass of titanium metal = 24.8 g mass of coffee-cup =75.0 g specific heat capacity of…

Q: A piece of metal at 20°C that weighs 60.0 g is dropped into 200. g of water at 100°C. The specific…

A:

Q: The specific heat capacities of copper, gold, and cobalt are given. Based on this information, which…

A: Specific heat capacity means the amount of heat required to raise the temperature of 1 gram of a…

Q: If a 125 g sample of iron is heated to 250.0oC and then placed in 500.0 g of water at 25.0 oC in an…

A:

Q: A generic solid, X, has a molar mass of 61.6 g/mol. In a constant-pressure calorimeter, 18.3 g of X…

A: Heat absorbed/ released by a solution can be calculated by usingthe expression:Q = m.Cp.∆T where, m=…

Q: When a sample of Mg is combusted in a bomb calorimeter, 25.4 kJ of energy as heat is evolved. The…

A: Assuming the final temperature of water and bomb calorimeter in equilibrium is T. Hence the change…

Q: A 149.9-g sample of a metal at 74.2°C is added to 149.9 g H2O at 14.1°C. The temperature of the…

A: Interpretation - To determine the specific heat capacity of metal sample when here a 149.9-g sample…

Q: A calorimeter contains 2.50 kg g of water at 37.0 °C. A 225-g sample of ice (at -20.0 °C) is added…

A:

Q: A 52.75 gram sample of iron (with a heat capacity of 0.450 J/g ºC) is heated to 100.0 ºC.

A: Calculating heat of water: Mass of water (m) = 46.64g Specific heat of water (s) = 4.184 J/g°C…

Q: 12.755 g of a metal initially at 99.0ºC are placed into 75.0 g of water intially at 23.0ºC. The…

A:

Q: A 240.0-g sample of water at 25.0°C is mixed with 120.9 g of a certain metal at 100.0°C. After…

A:

Q: A 47.0 g sample of an alloy is heated to 121.0 °C and dropped into 106 g of water at 20.0 °C. The…

A: The mass of the alloy is .The initial temperature of the alloy is .The mass of water is .The initial…

Q: A foundry worker places a 5.77 kg sheet of cobalt at a temperature of 15°C on top of a 16.8 kg sheet…

A:

Q: A chemist is asked to determine the specific heat capacity of an unknown mineral. The 154-g sample…

A:

Q: 2. A piece of a metal with an unknown identity has a mass of 23.8 g. The sample is heated to 125°C…

A: Mass of metal = 23.8 g Temperature = 125 0C mass of water = 50 g Initial temperature = 24 0C Final…

Q: 151.0-g sample of a metal at 75.0°C is added to 151.0 g H20  at 14.2°C. The temperature of the water…

A: Solution:     Specific heat is defined as the amount of heat required to raise the temperature of a…

Q: A 151.8-g sample of a metal at 74.0°C is added to 151.8 g   at 15.8°C. The temperature of the water…

A: Given : Mass of water = 151.8 g Mass of metal = 151.8 g Initial temperature of water = 15.8 oC Final…

Q: A piece of unknown metal with a mass of 22.03 g is heated in boiling water to 90.34°C and then…

A: Given;

Q: A 149.6-g sample of a metal at 75.0°C is added to 149.6 g H2O  at 14.0°C. The temperature of the…

A: Given For metal, mass(m)=149.6 g Initial temperature(Ti)=75℃ Final temperature(Tf)=30℃ Specific…

Q: A 2.62E1 g sample of aluminum at 1.008E2 °C is added to 1.002E2 g of water at 2.22E1 °C in a…

A: For a chemical reaction or physical process to occur a certain amount of energy should be furnished…

Q: A piece of unknown metal with a mass of 18.01 g is heated in boiling water to 98.9°C and then…

A:

Q: A sheet of gold weighing 9.3 g and at a temperature of 15.2°C is placed flat on a sheet of iron…

A: Since both the metals are in contact  hence the heat will transfer from the hot sheet to cold sheet…

Q: A piece of iron (mass = 25.0 g) at 398 K is placed in a styrofoam coffee cup containing 25.0 mL of…

A: Given,Mass of iron (m1) = 25 gInitial temperature of iron (Ti) = 398 KSpecific heat capacity of iron…

Q: A metal object with mass of 24.9 g is heated to 97.0 ∘C and then transferred to an insulated…

A: Heat = mass of substance X specific heat X temperature change

Q: A piece of unknown metal with a mass of 15.24 g is heated in boiling water to 96.17°C and then…

A:

Q: 140.0-g sample of water at 25.0°C is mixed with 126.1 g of a certain metal at 100.0°C. After thermal…

A:

Q: A hot lump of 37.0 g of copper at an initial temperature of 74.3 °C is placed in 50.0 mL H2O…

A: Given;

Q: A piece of iron (mass = 25.0 g) at 368 K is placed in a styrofoam coffee cup containing 25.0 ml of…

A:

Q: hot lump of 25.4 g of aluminum at an initial temperature of 83.0 °C is placed in 50.0 mL H2O…

A: This concept is based on principle of calorimetry in this concept heat given by system and heat lose…

Q: A foundry worker places a 5.76 kg sheet of nickel at a temperature of 18°C on top of a 16.6 kg sheet…

A: The specific heat capacity for a given chemical substance or a solution refers to the amount of the…

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.