A mutant lab rat was lifting weights in the gym. During its workout, it lost 50 kJ as heat and maintained a constant bod...
A mutant lab rat was lifting weights in the gym. During its workout, it lost 50 kJ as heat and maintained a constant body temperature of 37 C. What was its change in internal energy (in kJ)?
a)-200
b)-50
c) 0
d) +50
e)+100
Homework Answers
-
Temperature is constant
So, there will not be any change in internal energy. Internal energy is state function that depends on temperature.
If temperature do not change, change in internal energy will be 0
Answer: c
Add Answer to:
A mutant lab rat was lifting weights in the gym. During its workout, it lost 50 kJ as heat and maintained a constant bod...
Please answer 9 and 10: 9. Aerobic respiration produces 30 molecules of ATP per molecule of...
Please answer 9 and 10:
9. Aerobic respiration produces 30 molecules of ATP per molecule of glucose that is oxidized. What is the percentage efficiency of aerobic respiration? AGº for the hydrolysis of atp = -31 kJ/mol a) b) 25% c) 32% d) 41% e) 88% 10. A mutant lab rat was running on a treadmill in the gym. The rat's treadmill was coupled to a pulley which raised a 200g weight 1.5 m high. At the same time, the...
1) Calculate the heat through a glass window that is 30.0 cm*150 cm in area and 1.20 mm&n
1) Calculate the heat through a glass window that is 30.0 cm*150 cm in area and 1.20 mm thick. Assume the temperature onthe inside of the window is 25.0�C while the outside temperature is 8.00�C. 2)Five hundred joules of heat is absorbed by a system that does 200 J of work on its surroundings. What is the change in the internal energy of the system? 3)An ideal gas expands isothermally, performing 8.80 kJ of work in the process. Calculate the heat absorbed during the expansion. 4)A gas contained in a cylinder that has a piston is kept at a constant pressure of 2.80*10^5Pa. The gas expands from0.500 m^3to 1.50 m^3 when 300 kJ...
7. When you heat water from just above its freezing point to just below its boiling...
7. When you heat water from just above its freezing point to just below its boiling point, the kinetic energy of the molecules (a) increases by about 18% (b) decreases by about 18% (c) doubles (d) it is impossible to say given this information 8. Anna’s body consists, roughly speaking, of 60 kg of water at human body temperature (37 C). Suppose Anna is standing next to a small frozen pond containing 200 kg of ice at 0 C. Which...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and a 2-kW baseboard electric resistance heater in the room is turned on and kept on for 15 min. The temperature rise of air at the end of 15 min is 2)An example of when it is appropriate to model a substance as an ideal gas is when a. The pressure and temperature are close to the critcal point b. The pressure and temperature are...
UESTION 1: Energy balance (50 points) Humans are able to control their heat production rate their...
UESTION 1: Energy balance (50 points) Humans are able to control their heat production rate their heal production rate and heat loss rate to maintain a nearly constant Core temperature of T-37°C under a wide range of environmental conditi under a wide range of environmental conditions. This process is called on th e heut transfer between a human body and its between hum summ e focus on a layer in the eur am m ature 308 Considera per with a...
d two moles of hydrochlorhermal energy arck on the su ®, 150,0 kJ of thermal serey...
d two moles of hydrochlorhermal energy arck on the su ®, 150,0 kJ of thermal serey are released at 25.00°C and o the surroundings as work is d only P- 7. When one mole of zinc and two moles of hydrochloric acid undergo the read Zn(s) + 2 HCl(aq) → ZnCl, (aq) + He), 150,0 kJ of thermal energy are reicas 1.000 atm. The Ha gas generated does approximately 2 500 KJ of work on the surroundings as expands. Calculate...
(1) A pig lying on a 2.0 cm thick wood floor has its belly in contact...
(1) A pig lying on a 2.0 cm thick wood floor has its belly in contact with the floor. Let the contact surface area of pig's belly and floor floor be 3000 cmn'. The floor is cooler than the pig's body temperature (30°C), and at a temperature of 0.0 °C. The thermal conductivity of wood is 0.126 W/m °K. What is the conductive heat transfer under steady-state conditions? (2) The Born energy EB (SI unit kcal/mol) is a measure of...
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...
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...
A poikilotherm is an organism whose internal temperature varies based upon its environment - it regulates...
A poikilotherm is an organism whose internal temperature varies based upon its environment - it regulates body temperature by basking or burrowing, for example a wood frog. In contrast, mammals are homeotherms, organisms which maintain thermal homeostasis. Both humans and frogs share similar enzymes. Say a metabolic reaction takes the form A → B. Its standard transformed free energy change (ΔG°) is 4.1 kJ mol-1 . (R = 8.3145 J K-1 mol-1 ). Calculate the equilibrium constant for the reaction...
Please answer 9 and 10:
9. Aerobic respiration produces 30 molecules of ATP per molecule of glucose that is oxidized. What is the percentage efficiency of aerobic respiration? AGº for the hydrolysis of atp = -31 kJ/mol a) b) 25% c) 32% d) 41% e) 88% 10. A mutant lab rat was running on a treadmill in the gym. The rat's treadmill was coupled to a pulley which raised a 200g weight 1.5 m high. At the same time, the...
UESTION 1: Energy balance (50 points) Humans are able to control their heat production rate their heal production rate and heat loss rate to maintain a nearly constant Core temperature of T-37°C under a wide range of environmental conditi under a wide range of environmental conditions. This process is called on th e heut transfer between a human body and its between hum summ e focus on a layer in the eur am m ature 308 Considera per with a...
d two moles of hydrochlorhermal energy arck on the su ®, 150,0 kJ of thermal serey are released at 25.00°C and o the surroundings as work is d only P- 7. When one mole of zinc and two moles of hydrochloric acid undergo the read Zn(s) + 2 HCl(aq) → ZnCl, (aq) + He), 150,0 kJ of thermal energy are reicas 1.000 atm. The Ha gas generated does approximately 2 500 KJ of work on the surroundings as expands. Calculate...
(1) A pig lying on a 2.0 cm thick wood floor has its belly in contact with the floor. Let the contact surface area of pig's belly and floor floor be 3000 cmn'. The floor is cooler than the pig's body temperature (30°C), and at a temperature of 0.0 °C. The thermal conductivity of wood is 0.126 W/m °K. What is the conductive heat transfer under steady-state conditions? (2) The Born energy EB (SI unit kcal/mol) is a measure of...
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...
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...
Most questions answered within 3 hours.
-
This java code won't run and I can't figure out the problem with
it. Please help...
asked 48 minutes ago -
Trace the following recursive methods:
a) isPal with the string “abccda”
b) isAnBn with the string...
asked 1 hour ago -
1. Which of the following is false about photosynthesis?
A. ATP is the molecule used to...
asked 2 hours ago -
A simple random sample of size n=64 is obtained from a
population with a mean of...
asked 3 hours ago -
(2 dimensions, 1 object, 2 accelerations)
1) A projectile is thrown with a wind. The wind...
asked 4 hours ago -
Brian makes $34,100 per year. How much can Brian expect to
contribute to FICA taxes in...
asked 5 hours ago -
To buy a new house you must borrow $155,000. To do this you take
out a...
asked 5 hours ago -
Spacely Sprockets is evaluating the construction of a new plant
on land the company purchased for...
asked 6 hours ago -
1. Consider a linear regression model of y on K regressors and
an intercept.
(i) Describe...
asked 6 hours ago -
Enter a balanced equation for the reaction between hydrochloric
acid and sodium sulfite.
Express your answer...
asked 6 hours ago -
Give a regular expression describing the language
{x | x ∈ Σ* and x does not...
asked 6 hours ago -
Masses of 1.0 kg, 2.0 kg, and 3.0 kg are each separately subject
to a net...
asked 6 hours ago