Chemistry
Chemistry, 24.03.2020 23:02, IUlawyer4535

An iron bar at 200°C is placed in thermal contact with an identical iron bar at 120°C in an isolated system. After 30 minutes, both iron bars are at
160°C. If the iron bars were placed in thermal contact in an open system instead of an isolated system, how would the results be different?
Assume that the room temperature is 25°C.

A. The temperatures of the iron bars after 30 minutes would be less than 160°C because heat would be lost to the surroundings.

B. It would take more than 30 minutes for both iron bars to reach 160°C because heat would be transferred less efficiently

C. The temperatures of both iron bars would increase as they absorb heat from the surroundings.

D. The temperatures of both iron bars would decrease because pieces of them would be lost to the surroundings.

answer
Answers: 2

Other questions on the subject: Chemistry

image
Chemistry, 22.06.2019 10:50, adam1299
Someone offer some answers to this, i will give 98 coins and mark as brainliest! i will put the rest of the lab down in the comments, solutions pre-lab questions: in this lab, you will make fruit drinks with powdered drink mix. complete the pre-lab questions to get the values you need for your drink solutions. calculate the molar mass of powered fruit drink mix, made from sucrose (c12h22o11).using stoichiometry, determine the mass of powdered drink mix needed to make a 1.0 m solution of 100 ml. (hint: use molarity = to find the moles of drink mix, then convert moles to grams using a mole conversion.)what mass of powdered drink mix is needed to make a 0.5 m solution of 100 ml?
Answers: 1
image
Chemistry, 22.06.2019 15:00, kandi2565
Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?
Answers: 2
image
Chemistry, 22.06.2019 23:00, aly02
Need asap question 1 minerals are organic compounds. true false question 2 what vitamin can be found in foods like oranges, grapefruits, and broccoli? a. vitamin a b. vitamin k c. vitamin c d. vitamin d question 3 what are minerals? a. chemical elements that are needed for body processes. b. organic compounds that the body needs in small amounts to function properly. c. small molecules used to build proteins. d. an organic compound that is insoluble in water and includes fats. question 4 how many types of vitamins does the human body need? a. 15 b. 11 c. 13 d. 17 question 5 vitamins are a good source of energy. true false
Answers: 1
image
Chemistry, 23.06.2019 03:00, Cheyenne7327
Analyze the reaction to determine whether the reaction is exothermic or endothermic. explain your reasoning.
Answers: 1
Do you know the correct answer?
An iron bar at 200°C is placed in thermal contact with an identical iron bar at 120°C in an isolated...

Questions in other subjects: