Chemistry, 05.05.2020 22:20 raishagibson
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
D.
The temperatures of both iron bars would increase as they absorb heat from the surroundings.
The temperatures of both iron bars would decrease because pieces of them would be lost to the surroundings.
Answers: 3
Chemistry, 22.06.2019 04:00
Actual ingredients of lab (the cookies i am actually making) 1/2 cup sugar 1/2 cup brown sugar 1 1/3 stick margarine 1 egg 1/2 tsp salt 1 tsp vanilla 1/2 tsp baking soda 1 1/2 cup flour 1 1/3 cup chocolate chip can you answer the questions below ? discussion 1. suppose you are given the following amounts of ingredients: 1 dozen eggs 24 tsp. of vanilla 1 lb. (82 tsp.) of salt 1 lb. (84 tsp.) of baking soda 3 cups of chocolate chips 5 lb. (11 cups) of sugar 2 lb. (4 cups) of brown sugar 1 lb. (4 sticks) of margarine a. for each ingredient, calculate how many cookies could be prepared if all of that ingredient were consumed. (for example, the recipe shows that using 1 egg- with the right amounts of the other ingredients- yields 24 cookies. how many cookies can you make if the recipe is increased proportionately for 12 eggs? ) b. to determine the limiting reactant for the new ingredients list, identify which ingredient will result in the fewest number of cookies. c. what is the maximum number of cookies that can be produced from the new amounts of ingredients?
Answers: 1
Chemistry, 22.06.2019 12:30
Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17
Answers: 1
Chemistry, 22.06.2019 14:30
The three types is stress that act on earths rocks are compression, tension, and
Answers: 1
An iron bar at 200°C is placed in thermal contact with an identical iron bar at 120°C in an isolated...
Social Studies, 27.08.2019 05:30
English, 27.08.2019 05:30
Mathematics, 27.08.2019 05:30
Arts, 27.08.2019 05:30
Mathematics, 27.08.2019 05:30
History, 27.08.2019 05:30
History, 27.08.2019 05:30
History, 27.08.2019 05:30
Biology, 27.08.2019 05:30