Homework Answers
Burning gasoline in a closed container releses more heat than burning in an open container. This is because a closed system will not exchange heat with the surroundings, meanin gthe entire heat will be readily available while in an open vessel much of the released heat will be lost to the surroundings.
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Which one will produce more heat, burning 200 mL of gasoline in an open steel container...
(#3) How much heat energy is released by dissolving 10.0 g of CaCl2 in 100.0 mL...
(#3) How much heat energy is released by dissolving 10.0 g of
CaCl2 in 100.0 mL of water?. Use formula q=mcAT. The specific heat
of water is 4.184J/g C, and the density os water is 1.00 g/mL.
Open the Endothermic and Exothermic Reactions Lab Activity (Section 6.5, Figure 6.9) to complete this worksheet. 1. Measure the temperature change after dissolving a 5 g sample of each substance in 100 mL of water. Determine which solutes have an exothermic dissolving process,...
(#5) How much heat is absorbed by dissolving 10.0 g of NaNO3 in 100.0 mL of...
(#5)
How much heat is absorbed by dissolving 10.0 g of NaNO3 in 100.0
mL of water?
Open the Endothermic and Exothermic Reactions Lab Activity (Section 6.5, Figure 6.9) to complete this worksheet. 1. Measure the temperature change after dissolving a 5 g sample of each substance in 100 mL of water. Determine which solutes have an exothermic dissolving process, and which have an endothermic dissolving process. Naci NaOH NaNO3 CaCl2 KOH NH4NO3 Temperature change (°C) 1-0.79 13.30 -2.88 |...
1. Suppose Gerte Guzzler has a daily income of $80. Gerte allocates her income between gasoline,...
1. Suppose Gerte Guzzler has a daily income of $80. Gerte allocates her income between gasoline, which she uses on her daily commute to work, and clothing, which she wears to work. The price of gasoline is $5 per unit (1 unit = 5 gallons) and the price of clothing is $2 per unit. a. How is Gerte affected by a government plan to ration gasoline to 5 units per day? Explain. Use a graph of the consumer choice model...
Which of the below best describes the reason the reheat Rankine cycle can produce higher thermal...
Which of the below best describes the reason the reheat Rankine cycle can produce higher thermal efficiencies than the simple Rankine cycle? (circle best answer) Select one: a. The reheat Rakine cycle has two turbines, so more power can be produced. b. The heat addition in the reheat Rankine cycle occurs at a lower average temperature. c. The reheat Rankine cycle has a reheater section in the boiler, so more heat can be added while burning the same amount of...
Reflux procedure and report 1) You start at the same time and in same devices reflux of 40 ml of ...
Reflux procedure and report 1) You start at the same time and in same devices reflux of 40 ml of hexane and in another one 40 ml of benzene. Which device will start reflux first? Explain 2) Why reflux is a referable method of running chemical reactions that require heating? Why not just heat your reaction content in the Erlenmeyer flask? 3) Why do we turn heat off first and water only after your device is at room temperature? 4)...
1a. Identify which will be hotter (have a higher final temperature) if you heat equal masses...
1a. Identify which will be hotter (have a higher final temperature) if you heat equal masses of water and aluminum, each starting at room temperature with 1.0 kJ of electrical energy. Explain your groups answer. 1b. You are holding an Al rod in one hand and an Fe rod in another. The rods have the same mass and temperature (273 K). Assuming the rate of heat transfer is the same for both, identify which one will come to your body...
Firms Y and Z both produce and sell small gasoline engines. The sales price is $200 per engine. Data for both firms at a sales volume of 50 units are as follows:
Firms Y and Z both produce and sell small gasoline engines. The sales price is $200 per engine. Data for both firms at a sales volume of 50 units are as follows: Firm YFirm ZSales (50 units)$ 10,000$ 10,000Variable costs ($50, $25)2,5001,250Total contribution margin$ 7,500$ 8,750Fixed costs4,5005,750Operating income (πB)$ 3,000$ 3,000 Required:From the existing level of sales, which firm's operating income (πB) is more sensitive to changes in sales volume? Show calculations and round your answers to 2 decimal places.
9) of the following bacteria which is more resistant to higher temperature a. one which produce...
9) of the following bacteria which is more resistant to higher temperature a. one which produce capsule b. one which produce flagella c. one which produce spore d. one which produce cell wall 10) Name two genuses of bacteria that undergo spore formation 11) What is a pH in relation to any given media a, sodium concentration in media b. chlorine concentration in media c. hydrogen concentration in media d. none of the above 12) Name two important media ingredients...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 2000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 1000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
(#3) How much heat energy is released by dissolving 10.0 g of
CaCl2 in 100.0 mL of water?. Use formula q=mcAT. The specific heat
of water is 4.184J/g C, and the density os water is 1.00 g/mL.
Open the Endothermic and Exothermic Reactions Lab Activity (Section 6.5, Figure 6.9) to complete this worksheet. 1. Measure the temperature change after dissolving a 5 g sample of each substance in 100 mL of water. Determine which solutes have an exothermic dissolving process,...
(#5)
How much heat is absorbed by dissolving 10.0 g of NaNO3 in 100.0
mL of water?
Open the Endothermic and Exothermic Reactions Lab Activity (Section 6.5, Figure 6.9) to complete this worksheet. 1. Measure the temperature change after dissolving a 5 g sample of each substance in 100 mL of water. Determine which solutes have an exothermic dissolving process, and which have an endothermic dissolving process. Naci NaOH NaNO3 CaCl2 KOH NH4NO3 Temperature change (°C) 1-0.79 13.30 -2.88 |...
Which of the below best describes the reason the reheat Rankine cycle can produce higher thermal efficiencies than the simple Rankine cycle? (circle best answer) Select one: a. The reheat Rakine cycle has two turbines, so more power can be produced. b. The heat addition in the reheat Rankine cycle occurs at a lower average temperature. c. The reheat Rankine cycle has a reheater section in the boiler, so more heat can be added while burning the same amount of...
Reflux procedure and report 1) You start at the same time and in same devices reflux of 40 ml of hexane and in another one 40 ml of benzene. Which device will start reflux first? Explain 2) Why reflux is a referable method of running chemical reactions that require heating? Why not just heat your reaction content in the Erlenmeyer flask? 3) Why do we turn heat off first and water only after your device is at room temperature? 4)...
9) of the following bacteria which is more resistant to higher temperature a. one which produce capsule b. one which produce flagella c. one which produce spore d. one which produce cell wall 10) Name two genuses of bacteria that undergo spore formation 11) What is a pH in relation to any given media a, sodium concentration in media b. chlorine concentration in media c. hydrogen concentration in media d. none of the above 12) Name two important media ingredients...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 2000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
CHAPTER 9 REVIEW QUESTIONS 1. How much heat is required to raise the temperature of a 0.04 kg stainless steel spoon from 20°C to 50°C if the specific heat of stainless steel is 0.50 kJ/kg-C? (A) 200 (B) 400 (C) 600 (D) 800) (E) 1000 5. An ideal gas is confined to a container whose volume is fixed. If the container holds n moles of gas, by what factor will the pressure increase if the absolute temperature is increased by...
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