1. List all the changes of state that absorb energy. 2. List all the changes of...
1. List all the changes of state that absorb energy.
2. List all the changes of state that release energy.
3. When a substance changes state from liquid to gas, is energy absorbed or released?
4. When a substance changes state from liquid to solid, is energy absorbed or released?
5. It takes 80. calories to melt one gram of ice. Calculate how many calories it would take to melt 25 of ice
Homework Answers
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1. List all the changes of state that absorb energy.
2. List all the changes of...
1.literature value of energy in a "big mac" is 540 kcal, and energy required to melt...
1.literature value of energy in a "big mac" is 540 kcal, and energy required to melt ice is 80 cal/gram (not kcal). An unusual diet plan is to "cancel" calories gained from food by eating ice to absorb calories. How many kilograms of ice would offset one big mac?
A 357.7-gram sample of an unknown substance (MM = 92.41 g/mol) is heated from -23.1 °C...
A 357.7-gram sample of an unknown substance (MM = 92.41 g/mol) is heated from -23.1 °C to 51.8 °C. (heat capacity of solid = 2.96 J/g･°C; heat capacity of liquid = 1.75 J/g･°C; ∆Hfus = 8.04 kJ/mol; Tf = 17.6 °C) A.) How much Energy (in KJ) is absorbed/released to heat the solid? B.) How much energy (in KJ) is absorbed/ released to melt solid? C.) How much energy (in KJ) is absorbed/ released to heat the liquid? D.) What...
1. Rank the states of matter in order of increasing kinetic energy. a) solid < liquid <...
1. Rank the states of matter in order of increasing kinetic energy. a) solid < liquid < gas b) gas < liquid < solid c) solid = liquid < gas d) solid < liquid = gas 2. Rank the states of matter in order of decreasing intermolecular forces. a) gas > liquid = solid b) solid = liquid > gas c) solid > liquid > gas d) gas > liquid > solid 3. When a substance in its liquid state undergoes a decrease in kinetic energy _____. a) it...
Part C: Energy in Changes of State: CI. Mass of empty calorimeter cup with lid 6-835...
Part C: Energy in Changes of State: CI. Mass of empty calorimeter cup with lid 6-835 107.15 C2. Mass of calorimeter with lid + water C3. Final water temperature Initial water temperature C4. Mass of calorimeter with lid + water + melted ice 135.648 Calculations: CS. Mass of water C6. Temperature change (AT) C7. Calories lost by water Calories used to melt ice C8. Mass of ice that melted C9. Heat of fusion (calories to melt 1 g of ice)...
foundation of chemistry scc101 Part C: Energy in Changes of State: C1. Mass of empty calorimeter...
foundation of chemistry scc101
Part C: Energy in Changes of State: C1. Mass of empty calorimeter cup with lid C2. Mass of calorimeter with lid+ water 24 242 23 52 C3. Final water temperature oC Initial water temperature OC C4. Mass of calorimeter with lid+water+ melted ice Calculations: C5. Mass of water 12b 042 49,28° OC cal cal C6. Temperature change (AT) C7. calories lost by water Calories used to melt ice 30.284 C8. Mass of ice that melted C9....
question 1 & 2 please uiz Instructions Question 1 Which of the following indicates a chemical...
question 1 & 2 please
uiz Instructions Question 1 Which of the following indicates a chemical reaction takes place? (select all that apply) release of a gas release of light a white solid is added to water and sits on the bottom of the container formation of a solid from mixing aqueous solutions ablue solution stays blue when a substance is added a solution changes color when a substance is added novel odors or formation of bubbles without heating D...
1. Definitions. Fill in the blank with the LETTER of the most appropriate term from the...
1. Definitions. Fill in the blank with the LETTER of the most appropriate term from the following: A. Charles' Law B. neutralization C. heat of fusion D. Dalton's Law E. heat of vaporization F. heat capacity (specific heat) G. evaporation H. condensation I. melting J. Boyle's Law K. ideal gas law L. pressure M.PH N. Arrhenius acid S. Arrhenius base T. kinetic molecular theory states that pressure and volume are inversely proportional states that volume and absolute temperature are directly...
Post lab questions: 1. Draw a cooling curve for water to change the physical state from...
Post lab questions: 1. Draw a cooling curve for water to change the physical state from gaseous phase of water to its solid phase. COS aos-liquid o oxgos-lie condences liquid temperature Solid-liquid 00000 00000 Solid time 2. What is the heat, q, required to melt 10 grams of ice in a) Joules b) calories? a) 9-mXHF 10GX 334 5/4= 33405
A table of enthalpies of solvation in water is given below for various substances at 298...
A table of enthalpies of solvation in water is given below for various substances at 298 K and 1 bar. Which of these substances release heat when dissolved (exothermic) and which absorb heat when dissolved (endothermic)? If you dissolved 5 mol of each of these in water at 298 K, how much heat would be absorbed or released? Assume the enthalpy of solvation is constant for all solute concentrations. Calculate the temperature change if 1 L of liquid water at...
ments Exit 48:19 Energy is released; energy is absorbed True or False: In a state function...
ments Exit 48:19 Energy is released; energy is absorbed True or False: In a state function the path taken from the initial to final conditions must be considered. False True A small amount of solid CO2 (dry ice) is placed into a balloon. As the CO2 evaporates the halloon inflaten What ... in
Part C: Energy in Changes of State: CI. Mass of empty calorimeter cup with lid 6-835 107.15 C2. Mass of calorimeter with lid + water C3. Final water temperature Initial water temperature C4. Mass of calorimeter with lid + water + melted ice 135.648 Calculations: CS. Mass of water C6. Temperature change (AT) C7. Calories lost by water Calories used to melt ice C8. Mass of ice that melted C9. Heat of fusion (calories to melt 1 g of ice)...
foundation of chemistry scc101
Part C: Energy in Changes of State: C1. Mass of empty calorimeter cup with lid C2. Mass of calorimeter with lid+ water 24 242 23 52 C3. Final water temperature oC Initial water temperature OC C4. Mass of calorimeter with lid+water+ melted ice Calculations: C5. Mass of water 12b 042 49,28° OC cal cal C6. Temperature change (AT) C7. calories lost by water Calories used to melt ice 30.284 C8. Mass of ice that melted C9....
question 1 & 2 please
uiz Instructions Question 1 Which of the following indicates a chemical reaction takes place? (select all that apply) release of a gas release of light a white solid is added to water and sits on the bottom of the container formation of a solid from mixing aqueous solutions ablue solution stays blue when a substance is added a solution changes color when a substance is added novel odors or formation of bubbles without heating D...
1. Definitions. Fill in the blank with the LETTER of the most appropriate term from the following: A. Charles' Law B. neutralization C. heat of fusion D. Dalton's Law E. heat of vaporization F. heat capacity (specific heat) G. evaporation H. condensation I. melting J. Boyle's Law K. ideal gas law L. pressure M.PH N. Arrhenius acid S. Arrhenius base T. kinetic molecular theory states that pressure and volume are inversely proportional states that volume and absolute temperature are directly...
Post lab questions: 1. Draw a cooling curve for water to change the physical state from gaseous phase of water to its solid phase. COS aos-liquid o oxgos-lie condences liquid temperature Solid-liquid 00000 00000 Solid time 2. What is the heat, q, required to melt 10 grams of ice in a) Joules b) calories? a) 9-mXHF 10GX 334 5/4= 33405
A table of enthalpies of solvation in water is given below for various substances at 298 K and 1 bar. Which of these substances release heat when dissolved (exothermic) and which absorb heat when dissolved (endothermic)? If you dissolved 5 mol of each of these in water at 298 K, how much heat would be absorbed or released? Assume the enthalpy of solvation is constant for all solute concentrations. Calculate the temperature change if 1 L of liquid water at...
ments Exit 48:19 Energy is released; energy is absorbed True or False: In a state function the path taken from the initial to final conditions must be considered. False True A small amount of solid CO2 (dry ice) is placed into a balloon. As the CO2 evaporates the halloon inflaten What ... in
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