Background info: A unit of heat energy=calorie=amount of heat that raises 1 g of liquid water by 1 degrees C. 1) How many calories of heat need to be removed from a 100 g sample of water to drop the temperature from 99 degrees C to 1 degrees C ?  2) How many calories of heat will raise the temperature of 60g of ethylene gylcol from 10 degrees C to 50 degrees C?

Q: How many calories of heat energy are released when 50 grams of water is cooled from 70°C to 60°C?

A: This problem can be solved using the formula Q = mC∆T  Where, Q = heat released or absorbed by water…

Q: If the specific heat of methanol is 2.51 J/K-g, how many joules are necessary to raise the…

A: Given, mass of methanol = 94 g C= 2.51 J/K g Tf = 79°C = 273+79 = 352 K Ti = 26°C = 273 + 26 = 299 K…

Q: You heat 2 g of water from 25 °C to 26 °C. How many calories of energy are transferred to the water?…

A: Given:  Mass of water = 2g  ∆T = 26-25 = 1°C  Cwater = 1 cal/g°C

Q: What mass of water will give up 240 calories when the temperature drops from 100 deg C to 68 deg C.…

A: Given:: Heat q= -240 cal T1=100 ℃  T2=68℃  Specific heat capacity of water, Cp= 1 cal g-1℃-1 mass of…

Q: . The specific heat of wood is 2.03 J/g-°C. How much heat is needed to convert 550 g of wood at…

A: Mass M = 550 g Specific heat c = 2.03 J/g°C Initial temperature Ti = -15.0 °C Final temperature Tf =…

Q: how many grams of water  would require 2.20 x 104 calories of heat to raise its temperature from…

A: Using formula for specific heat we have solved this problem.

Q: Select true or false for each of the following.   Energy can be changed in form.    ΔT in units of…

A: The answers for the questions are provided below. Here the concepts are used from thermodynamics.…

Q: How many joules are required to heat 180g of water from 20c to 35c. The specific heat of water is…

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Q: Convert 16.00 kJ to calories (cal). 16.00 kJ = Convert 193 kcal to kilojoules (kJ). 193 kcal = cal…

A: The objective of this question is to convert energy units from kilojoules to calories and then from…

Q: How many calories are required to increase the temperature of 13g of alcohol from 11 degrees celsius…

A: q = mc∆T Where q = heat required  c = specific heat  ∆T = change in temperature

Q: How many kJ of heat is needed to raise the temperature of 0.250 L of water in t liquid phase from…

A: Volume of water V = 0.250 LT1 = 24.6 oCT2 = 46.2 oC

Q: How much heat, in joules and in calories, must be added to a 75.0-g iron block with a specific heat…

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Q: How many calories (cal) are needed to warm 25 g of water from 65 ̊C to 92 ̊C. specific heat of water…

A: Heat capacity of water is 1.00 cal/g˚C Heat required to convert 25 g of water from 65˚C to 92˚C can…

Q: The temperature of a beaker containing 194 mL (density of water is 1 g/mL) of water changes from 16…

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Q: If 980 J of energy as heat are transferred to 6.2 L of water at 291 K, what will the final…

A: The amount of heat required to increases the temperature of the 1 g of the substance by 1 degree is…

Q: how many calories are required  to raise  the temperature of (2.6x10^2)h of water from 42.0celsius…

A:

Q: 10 g of solid NH4Cl is mixed with 50 g of water in a calorimeter that absorbs no heat. The…

A: The heat of solution, also known as the enthalpy of solution, is the heat energy absorbed or…

Q: When 3.02 g of NH4Cl  is dissolved in enough water to make 20.05 mL of solution, the temperature…

A: To find enthalpy change, first find q of reaction by using formula of q. Then divide the calculated…

Q: A solution is made by mixing 197.3 g of ethanol initially at 10.5°C with 250.0 g of water initially…

A: We know that, according to the law of conservation of heat energy, energy gained or loss by the…

Q: How many joules of heat are absorbed when 1000g of water is heated from 18oC to 85oC? The specific…

A: We have to find how many joules of heat are absorbed when 1000g of water is heated from 18oC to…

Q: 50 mL (50 g) of 6.0 M HCl is mixed with 50 mL (50 g) of 6.0 M NaOH in a calorimeter that absorbs no…

A: The problem involves a calorimetry experiment where an acid (HCl) is mixed with a base (NaOH) in a…

Q: How many joules of heat must be removed from 432g of water. (heat capacity of 4.184j / g celsuis) to…

A: Joules of heat can be calculated by using following formula,The equation for heat is  Q=m(Δt)Cp

Q: Is the following PE diagram representing an endothermic or exothermic reaction? PE (kJ) 250 200 150…

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Q: How much heat, in calories, must be added to a 102.0g iron block with a specific heat of 0.449 J/g…

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Q: When 20 calories of heat is added to 2.0 grams of water at 15 degrees Celsius the temperature of…

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Q: 1. What is the specific heat of a 10. g sample of a substance that requires 950 J of heat to raise…

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Q: Calculate the specific heat of concrete if 3620 J of heat causes the temperature of a 250 g sample…

A: A temperature rise of the sample indicates that heat is absorbed by the sample. The formula of heat…