1. Calculate the amount of heat energy associated with 125 g of ice at 0°C turning into water at 0•C.

Q: What is the heat of vaporization for a liquid and why is it useful?

A: The vaporization is the transition process where liquid converted to vapor phase. The heat of…

Q: The heat of vaporization of water is 40.66 kJ/mol. How much heat is absorbed when 2.02 g of water…

A: Given,  Heat of Vaporization of water, ∆Hvap = 40.66 kJ/mol  Mass of water, m = 2.02 g

Q: 2. How much heat must be added to 110.0 g of ice at -18.0°C to change it to water at 47.5°C ? (Cice…

A: The following formula is used to calculate the required heat.

Q: (a) If 83.0 g of ice at 0.0oC is placed in 235mL of water at 28.0oC, find the final temperature of…

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Q: How much heat is needed to boil 785 g of water that is at 17.6 ºC?

A: To find out the total heat required for boiling the 785g water at 17.6-degree centi.... following…

Q: If humans instead had ice in their body and the main mechanism of heat loss was through the melting…

A: Mass of ice needed would be less because in water there will be only temperature change but in case…

Q: How much energy is needed to boil 45.0g of water at its boiling point? Water's heat of vaporization…

A: Given: Mass of water = 45.0 g. And heat of vaporization of water = 40.65 KJ/mol.

Q: How many grams of ethanol, C,H,OH, can be boiled with 192.5 kJ of heat energy? The molar heat of…

A: Heat (Q) = 192.5 KJ Molar heat of vaporization (Hvap) = 38.6 KJ/mol Mass of ethanol (m) = ?

Q: How much heat in kJ is required to convert 916 g of ice at -11.0°C to liquid water at 99.0°C?

A: Ice undergo various transition from -11°C to 99°C and releases heat at each stage

Q: How much heat in kilojoules is required to (a) melt and (b) boil 1.50 mol ofisopropanol (rubbing…

A: First convert moles to mass in grams by multiplying with molar mass of isopropyl alcohol 1.5 mol x…

Q: How do phase changes of water entail the exchange of energy? (In other words, explain latent heat.)

A: Phase changes of water are accompanied by the exchange of latent heat. Even as heat is added or…

Q: Determine the total amount of heat in kJ needed to warm 36.9 g of ice at -29.4 °C to water at 39 °C.…

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Q: 12. How much energy is needed to change a 47 g cube of ice from -29 °C to liquid water, at 29 °C?…

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Q: (c) Calculate the specific heat of the metal 9. How much energy is required to change 50.0 g ice at…

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Q: The molar heat of vaporization of water at 25 °C is +43.9 kJ/mol. How many kilojoules of heat would…

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Q: The molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively,…

A: Molar heat of fusion of water = 6.02 kJ/mol  Molar heat of vapourisation of water = 40.6 kJ/mol…

Q: Draw an energy diagram, for this phase change: NH3(l) → NH3(g).

A: An energy diagram is drawn by taking Energy on X-axis and Temperature on Y-axis. During phase…

Q: How much heat is released ( in J) when 54.0 g of water at 10.0 °C is cooled to form ice at - 10.0…

A: Given the mass of water, m = 54.0 g  The initial state is water at 10.0 oC.  The final state is ice…

Q: A 7.0 g ice cube is placed into 230 g if water. Calculate the temperature change in the water upon…

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Q: What is quantity of heat (in KJ) associated with cooling 212.7 g of water from 25.60 C to ice at…

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Q: How many KILOJOULES of heat is required to boil the entire 1.0 Kilogram of liquid water?

A: To calculate the heat required to boil liquid water , we would use formula : q = m × ∆Hvap Where , m…

Q: Using the provided data, calculate the amount of heat, in kJ, that must be removed to cool 29.6 g of…

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Q: Calculate the amount of heat (kJ) required to vaporize 3.5 kg water at its boiling point. Hvap=…

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Q: 7. How does the molar heat of vaporization of a substance compare to its molar heat of condensation?

A: Since you are posted with multiple question. As per the rule, I am answering the first question…

Q: How much heat energy is required to boil 18.4 g of ammonia, NH3? The molar heat of vaporization of…

A: mass of 1 mol of ammonia = mass of 1 mol of N + mass of 3 mol of H atommass of 1 mol of ammonia =…

Q: How much heat is needed to melt 466 g of silver that is at 22.3 ºC?

A: Given that : Mass of Silver = 466g Initial temperature (T1) = 22.3°C Melting point of Silver (T2) =…

Q: A 37.0 g sample of ice is held at -12.0 °C. If the ice absorbs 25800 J of heat, what state and…

A: We can determine the final state of the water from the final temperature.  The formula is : q = m ×…

Q: How much energy does it take to convert 75.0 g of ice at -30.0oC to water at 0.0oC?

A: We have given that Mass of ice = 75 g T1 = -30°C T2 = 0°C 2.06J/goC2.06J/goC2.06J/goC2.06J/goC Cp…

Q: Determine the quantity of ice required to absorb exactly 50 kJ of energy when the ice warms from…

A: Specific heat capacity () is the quantity of heat () absorbed per unit mass () multiplied by…

Q: How much heat is required to melt 63.0 g of ice? AH = 6.01 kJ/mol. fus kJ

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Q: How much energy (in Joules) does it take to completely vaporize 250 ml of water that is already at…

A: we have to calculate the energy needed to vaporize 250 ml of water

Q: 2. Calculate the amount of heat energy associated with 255 g of water vapor condensing at 10°C.

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Q: How much heat in joules is needed to raise the temperature of 5.0 L of water from 0°C to 89.0°C?…

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Q: a. Calculate the heat required to melt 7.64 g of benzerie at jts normal melting point. Heat of…

A: Given: Mass of benzene = 7.64 g. Heat of fusion of benzene = 9.92 KJ/mol. And heat of vaporization…

Q: What mass of ice at 0° is necessary to cool 150 g of water from 25°C to 0°C?

A: The objective of this question is to find out the mass of ice required to cool a certain amount of…

Q: how much heat is needed to boil 63 g of ethanol if the latent heat of vaporization of ethanol is 838…

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Q: A 12.0 g sample of water vapor at 100.0 C is placed in contact with a large quantity of ice at 0.0…

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Q: 2. Calculate the amount of heat required to increase the temperature of 375 g of ice at -12°C to…

A: The given data contains, mass = 375 g. Initial temperature = -120C. Final temperature = 280C.

Q: What is the enthalpy (in J) required to melt a 4.77g block of Ice? H fusion= 6.00) kJ/mol

A: amount of energy needed for completion of reaction is known as enthalpy of reaction.

Q: A 5.00 g sample of water vapor, initially at 155*C is cooled at atmospheric pressure, producing ice…

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Q: How many joules of heat energy are needed to heat 25.0 g of ice at -5.0°C to a final temperature of…

A: Here we are required to find the heat energy needed for heating 25g of ice at -5°C to 40°C

Q: How much heat in kJ is required to convert 906 g of ice at-11.0°C to liquid water at 85.0°C? 701…

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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.