To melt a sample of ice cubes at 0 °C, the cubes must absorb 41.8 kJ of heat. What is the mass, in grams, of the sample of ice? (Heat of fusion of water is 334 J/g) O 7.99 g of ice 125 g of ice 140. g of ice 0.125 g of ice O 14.0 g of ice

Q: How much heat would need to be removed to cool 29.5 g of water from 25.6°C to -10.7°C? Csolid =…

A: We have to predict the amount of heat removed from the water to have given temperature change.

Q: A student boils 9.43 grams of an unknown substance into vapor. If completely vaporizing the…

A: Heat of Vaporisation :- Energy required to make vapor of a fixed amount of liquid to its vapor.

Q: the amount of heat energy needed

A: According to the question we have, C = 2.09 j/g.⁰C  T1 = –25⁰C T2 = –50⁰C m = 100 g The following…

Q: Calculate the energy needed to melt 3.0 g of ice at 0°C, heat it to boiling, boil it, and heat the…

A:

Q: How many joules of heat energy are required to heat 25.0 grams ethyl alcohol from prevailing room…

A: Given : Mass of ethyl alcohol = 25.0 g Initial temperature of ethyl alcohol = 22.5 oC Final…

Q: We pack two identical coolers for a picnic, placing 24 12-ounce soft drinks and five pounds of ice…

A: When two objects are kept together in contact and both of them possess different temperature then…

Q: Calculate the heat change in calories for melting 65 g of ice at 0 ∘C

A: When ice melts, the physicals state changes from solid to liquid. The energy or the heat required…

Q: The specific heat of ice is 2.06 J/g°C.  Calculate how much energy is needed to heat a 52.0 gram…

A: The amount of heat energy required to raise the temperature of a substance can be calculated using…

Q: How much heat is required to heat a 18.4 g ice cube from -23.0 °C to -1.0 °C? Specific heat of ice…

A:

Q: 1 5 Name: Grade Level: Date: Chemistry Explain how heat energy affects a substance. Describe how the…

A: Any substance can exist in 3 different phases - solid,liquid and gas.In solid phase atoms are very…

Q: How many joules of energy must be removed from 172 g of water at 27.1 °C to form ice at 0 °C?

A: Specific heat of substances.

Q: How much heat would need to be removed to cool 215.5 g of water from 25.6°C to -10.7°C? Csold =…

A: Mass of water = Mw = 215.5 gInitial Temperature = Ti = 25.6 °CFinal Temperature = Tf = -10.7°CCsolid…

Q: How much heat is involved when an 100 g ice at 0 °C is heated to 80 °C? Specific heat of ice is 0.5…

A: Given data - - > mass (m) = 100 g Specific heat (C) = 0.5 cal/g °C Initial temperature (T1) = 0°C…

Q: At a pressure of 1 atm, CO2 sublimes (changes directly from solid to gas) at -78°C. a. At 1 atm,…

A: Given :  Mass of CO2 = 2.20 gm  molar mass of CO2 = 44 gm/mol  Pressure  = 1 atm  Initial…

Q: The heat of fusion of water is 79.9 Cal/G. How much heat would be required to melt 75.9 G of ice?

A: Given: Mass of ice, m =75.9  g The heat of fusion of water =79.9 Cal/g

Q: If 14.5 kJ of heat were added to 485 g of liquid water, how much would its temperature increase?…

A:

Q: How much heat is needed to melt 23.8 g of copper that is at an initial temperature of 21.7 °C? The…

A: The heat of a solution can be expressed by the following formula   Q=mCΔT Q=heat m=mass C=heat…

Q: Calculate the heat change in calories for melting 95 g of ice at 0 ∘C.

A: Heat absorbed to convert solid substance to liquid form is called heat of fusion (dHfus).

Q: The specific heat capacity of liquid mercury is 0.14 J/gK. Calculate the amount of heat in are…

A: Specific heat capacity is the amount of heat that needs to increase the temperature by 1 oC of a 1 g…

Q: How many joules of energy must be removed from 175 g of water at 22.2 °C to form ice at 0 °C?

A: Mass of water = 175 g  Initial temperature = 22.2 °C  Final temperature = 0°C  The amount of energy…

Q: 6. Heat that causes change in temperature without a change in phase. 7. Heat that causes change in…

A: 6. Heat that causes change in temperature without a change in phase is known as Sensible heat In…

Q: How much heat is required to melt 62.0 g of ice at its melting point? Express your answer…

A: Given, amount of ice =62.0 gramwe are asked to calculate the heat required to melt 62.0 gram of ice…

Q: A 35.8-g sample of cadmium metal was melted by an electric heater providing 4.66 J/s of heat. If it…

A: The amount of cadmium sample is = 35.8 g Time take to melt this sample is = 6.92 min The heat…

Q: The heat of fusion for water is 80 calories / Gram in the heat of vaporization for water is 540…

A: Heat of fusion is the amount of energy which is required to convert ice into the water at the same…

Q: How much heat energy is needed to heat and then completely melt a 6.00 gram solid gold ring at an…

A: The required amount of energy from a solid state to the liquid state can be determined by the…

Q: Which of the following statements is true in regards to heat? A When you hold a piece of ice,…

A:

Q: How many joules of energy must be removed from 131 g of water at 14.5 °C to form ice at 0 °C? How…

A:

Q: A 45.0 g chunk of ice at -12°C absorbs 12.0 kJ of heat. How many grams of ice melt? sp heat of ice…

A: Ice is at -12°C and it can not melt at this temprature For ice to melt temperature should be 0°C…

Q: What is the total amount of heat released when 94.0 g water at 80.0 °C cools to form ice at −30.0…

A:

Q: . How much heat must be removed from 15.5 g of water at 90.0°C to cool it to 43.2

A: q=m.c.∆T q= heat  m=mass C.=heat capacity ∆T= difference in temperature

Q: How much heat (in J) is released when 0.9 L of water freezes at 0.0°C? The heat of fusion of water…

A: When water freezes heat is released. this is an exothermic process.

Q: The specific heat capacity of liquid mercury is 0.14 J/gK. How many joules of heat are needed to…

A: Specific heat capacity is the amount of heat that is required to rise a temperature of 1 kgsubstance…

Q: Calculate the total amount of energy required to change 10.0 g of water from 35.0 degrees Celsius to…

A: Given that : Mass of water = 10.0g Initial temperature (T1) = 35°C Final temperature (T2) = 110°C…

Q: The heat of fusion for sea ice is 79.70 cal/g. How many calories of heat are needed to melt a 35.00…

A:

Q: How much heat energy is needed to melt 750.0 grams of ice. it needs to be in kj

A: We have to calculate how much heat  energy  is needed to melt 750 grams of ice.

Q: How much heat would need to be removed to cool 192.7 g of water from 25.6°C to -10.7°C? Csolid =…

A: Heat released = 24.954 kJ

Q: A 100 g sample of ice is heated from -15 oC to its melting point of 0 oC and then melted completely.…

A: First we will calculate moles of water using mass and molar mass  molar mass of H2O = 18.02 g/mol…

Q: How much heat is released when 25.0 grams of water at 25.8 degrees C changes to ice at -14.5 degrees…

A: We determine the heat evolved in a temperature change by the formula= ∆H = m x s x ∆T where m is…

Q: 134% If you want to melt 81.1 g of antimony, how much energy do you need to add if the heat of…

A:

Q: How much energy (in calories) is required to melt 25.0 g of ice to water at 0.0 °C, heat the liquid…

A: Given that, heat of fusion of water = 79.7 cal g-1 To convert 25 g of ice at 0 ∘C to 25 g of water…

Q: Hesting Curve of Weter Evaporation Steam 100- Candensastion 50- Water Melting Freezing lce Jeules…

A:

Q: Which process releases the greatest amount of heat?a) the condensation of 10 g of gaseous waterb)…

A: The explanation is as given below;

Q: How much energy is released when 75.3 g of water vapor at 115 °C condense and cool to liquid at 25.0…

A: Given that : Mass of water (m) = 75.3 g Initial temperature = 115°C Final temperature = 25.0 °C The…

Q: Determine the amount of heat, in kJ, required to heat 19 g of solid Ca at 125 C to 851C (still…

A: Given; mass, temperatures

Q: Some amount of heat energy is removed from a 8cm X 18cm X 49cm block of ice to cool from 0ºC to…

A: The relative amount of the heat required to raise the temperature of an object by one degree to the…

Q: Calculate the heat change in joules for vaporization of 9.00 g of water at 100 ∘C.

A: Heat of vaporisation of water is 2256 J/g/0C.Thus, when 1 mol ( 18 g) of water is vaporised, 2256…

Q: 1. Identify the phase change that happens from B to C on the graph. C B. D 2. Identify the phase…

A: The given graph is a cooling curve of a substance, starting from gaseous state at point A.

Q: How much heat is required to melt 1.7 kg of ice at 0 Celsius

A:

Q: Temperature of an iron block decreases from 850C to 250C. Calculate the heat lost by the block with…

A: Given data m = mass of iron block = 1200 g s = specific heat of iron block = 0.115 Cal/g-∘c Change…

Q: The melting point of calcium is 851 °C, its solid-state specific heat (Csolid) is 0.632 J/g°C, and…

A: a) Since at its melting point, the solid can be directly melted  hence the heat required will be  Q…

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.