Homework Answers
Let us consider object A and B are having same weight.
In such case object A possess larger heat capacity. We can justify as follows.
If any object possess less higher heat capacity that will absorb more heat and release more heat. Here Object A only absorbed more heat and released more heat. Due to the more heat, water temperature is raised to 3.5 0C while object B gave temperature to water until 2.6 0C.
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2. Two solid objects, A and B, are placed in boiling water and allowed to come...
PRE-LAB QUESTIONS 1. Calculate the enthalpy change for the reaction P,o,(s) + 202(g)--PO10(g) Given the following...
PRE-LAB QUESTIONS 1. Calculate the enthalpy change for the reaction P,o,(s) + 202(g)--PO10(g) Given the following enthalpies of reaction: P,(s)+30,(g) P,O,(g) AH- -1640.1 k P,(s)+50,(8)-P08 AH--2940.1 k) 2. Two solid objects, A and B, are placed in boiling water and allowed to come to the same tem- perature there. Each is then lifted and placed in separate beakers containing 100 g water at 10.0°C. Object A increases the water temperature by 3.50°C; B increases the water temperature by 2.60°C. Which...
4. 100.0 mL of water is placed in a calorimeter and allowed to reach an initial...
4. 100.0 mL of water is placed in a calorimeter and allowed to reach an initial temperature of 23°C. A 45.0g block of Cu (SH=0.385 J/g at 285°C is placed in the water (SH = 4.18 J/g. C) in the calorimeter. a) If the final temperature reached is 30°C, determine the heat capacity of the calorimeter? b) The same calorimeter was used to determine the heat of solution of 20.0g of NH4NO3 NH4NO3 (s) + NH4NO3 (29) The initial temperature...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be det...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 2.99 g of FeBrz(s) are dissolved in 102.70 g of water, the temperature of the solution increases from 25.90 to 29.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.59 J/°C....
2) A student boils a metal block for 2 minutes and the temperature of the boiling...
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Two objects, with different sizes, masses, and temperatures, are placed in thermal contact. Energy travels (a)...
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Two 20.0-g ice cubes at –10.0 °C are placed into 255 g of water at 25.0...
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a. When a solid dissolves in water, heat may be evolved or absorbed. The heat of...
a. When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 16.11 g of BaCl2(s) are dissolved in 118.70 g of water, the temperature of the solution increases from 22.98 to 25.41 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.71...
Question 44 of 50 Submit 3.15 mol of an unknown solid is placed into enough water...
Question 44 of 50 Submit 3.15 mol of an unknown solid is placed into enough water to make 150.0 mL of solution. The solution's temperature increases by 19.21°C. Calculate AH for the dissolution of the unknown solid. (The specific heat of the solution is 4.18 J/g.°C and the density of the solution is 1.20 g/mL). kJ/mol 1 2 3 C +/- : 0 x 100
when a solid dissolves in water, heat may be involved or absorbed. The heat of dissolution...
when a solid dissolves in water, heat may be involved or absorbed. The heat of dissolution can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 16.27 g of BaBr2 (s) are dissolved in 100.30 g of water, the temperature of the solution increases from 24.05 to 26.76°C. The heat capacity of the calorimeter was determined in a separate experiment to be 1.87 J/degrees Celsius. Based on the students observation, calculate the...
Part A: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be de...
Part A: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 2.79 g of NH4Cl(s) are dissolved in 106.00 g of water, the temperature of the solution drops from 23.17 to 21.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be...
PRE-LAB QUESTIONS 1. Calculate the enthalpy change for the reaction P,o,(s) + 202(g)--PO10(g) Given the following enthalpies of reaction: P,(s)+30,(g) P,O,(g) AH- -1640.1 k P,(s)+50,(8)-P08 AH--2940.1 k) 2. Two solid objects, A and B, are placed in boiling water and allowed to come to the same tem- perature there. Each is then lifted and placed in separate beakers containing 100 g water at 10.0°C. Object A increases the water temperature by 3.50°C; B increases the water temperature by 2.60°C. Which...
4. 100.0 mL of water is placed in a calorimeter and allowed to reach an initial temperature of 23°C. A 45.0g block of Cu (SH=0.385 J/g at 285°C is placed in the water (SH = 4.18 J/g. C) in the calorimeter. a) If the final temperature reached is 30°C, determine the heat capacity of the calorimeter? b) The same calorimeter was used to determine the heat of solution of 20.0g of NH4NO3 NH4NO3 (s) + NH4NO3 (29) The initial temperature...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 2.99 g of FeBrz(s) are dissolved in 102.70 g of water, the temperature of the solution increases from 25.90 to 29.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.59 J/°C....
2) A student boils a metal block for 2 minutes and the temperature of the boiling water is 105.1 °C. the metal block has a mass of 250.42 g. The metal object is removed from the boiling water and submerged in 130.00 mL of water at 23.7 °C. The equilibrium temperature was 36.9 °C. a) Assuming no heat was lost to the surrounding, determine the specific heat capacity of the metal. (6 points) b) Calculate the percent error if the...
Two objects, with different sizes, masses, and temperatures, are placed in thermal contact. Energy travels (a) from the larger object to the smaller object (b) from the object with more mass to the one with less (c) from the object at higher temperature to the object at lower temperature.
Question 44 of 50 Submit 3.15 mol of an unknown solid is placed into enough water to make 150.0 mL of solution. The solution's temperature increases by 19.21°C. Calculate AH for the dissolution of the unknown solid. (The specific heat of the solution is 4.18 J/g.°C and the density of the solution is 1.20 g/mL). kJ/mol 1 2 3 C +/- : 0 x 100
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