a)An 64.95 g sample of aluminum is placed on a 36.87 g sample of copper initially at 120.32oC. If the heat is only transferred between the metals (with no loss to the surroundings) and the final temperature of both metals is 37.68oC, what is the inital temperature (in oC) of aluminum?
b)How much heat (in kJ) is evolved (under standard conditions) when 209.14 g of copper reacts to form copper(II) oxide?
c)How much heat (in kJ) is needed when 61.38 g of water warms and boils from 40.01oC to 100oC?
d)What is recorded as the final temperature (in oC) on a constant pressure calorimeter if 12.403 g of potassium hydroxide is dissolved in 32.67 mL of water originally at 21.75oC?
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a)An 64.95 g sample of aluminum is placed on a 36.87 g sample of copper initially...
1. An 25.96 g sample of aluminum is placed on a 45.15 g sample of copper initially at 121.98oC. If the heat is only transferred between the metals (with no loss to the surroundings) and the final temperature of both metals is 48.99oC, what is the inital temperature (in oC) of aluminum? 2. How much heat (in kJ) is evolved when 87.9 g of water cools and freezes from 66.91oC to 0oC? Thank you very much!
An aluminum calorimeter with a mass of 425.00 g contains 1062.50 g of water. The calorimeter and water are in thermal equilibrium at 12.50 ° C. Two metal blocks are placed in the water. One is a piece of copper from 212.50 g to 85.00 ° C. The other has a mass of 202.50 g and is originally at a temperature of 105.00 ° C. The entire system is stabilized at a final temperature of 22.50 ° C. (a) Determine...
A
100 g aluminum calorimeter contains 250 g of water. The two
substances are in thermal equilibrium at 10°C. Two metallic blacks
are placed in water. One is a 50 gram piece of copper at 82°C. The
other sample has a mass of 57 g and is originally at a temperature
of 100°C. The entire system stabilizes at a final temperature of
20°C. Determine the specific heat of the unknown second sample.
A 100 g aluminum calorimeter contains 250 g...
How much heat (in kJ) is needed when 97.79 g of water warms and boils from 38.1oC to 100oC?
If a 61 g sample of metal at 100oC is placed into a calorimeter containing 60.0 g of water at 18.0 oC, the temperature of the water increases to 22.0 °C. Calculate the amount of heat lost by the metal sample in calories.
9. 100-g aluminum calorimeter contains 250-g of water. The two substances are in thermal equilibrium at 10° C. Two metallic blocks are placed in the water. One is a 50- piece of copper at 80° C. The other sample has a mass of 70-g and is originally at temperature of 100° C. The entire system stabilizes at a final temperature of 200 C. Determine the specific heat of the unknown second sample. (Assume the specific heat of aluminum, and copper...
A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 g piece of copper at 76°C. The other sample has a mass of 73 g and is originally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20°C. Determine the specific heat of the unknown second sample. J/kg·°C
An aluminum calorimeter with a mass of 100 g contains 250 g of water. The calorimeter and water are in thermal equilibrium at 10°C. Two metallic blocks are placed into the water. One is a 51.0-g piece of copper at 80°C. The other has a mass of 544 g and is originally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20°C. (a) Determine the specific heat of the unknown sample. (J/Kg*C) (b) Using the...
A 83.5 g sample of a metal alloy is heated to 88.1oC and it is then placed in a coffee-cup calorimeter containing 30.0 g water at 15.0oC. The final temperature of the metal + water is 25.3 oC. Calculate the specific heat of metal alloy, in J/(g oC), assuming no heat escapes to the surroundings or is transferred to the calorimeter. The specific heat of water is 4.184 J/(g oC).
A 15-g sample of the candy is placed in a small aluminum container of mass 0.325 kg filled with oxygen. This container is placed in 1.75 kg of water in an aluminum calorimeter cup of mass 0.624 kg at an initial temperature of 15.0 ∘C. The oxygen-candy mixture in the small container (a "bomb calorimeter") is ignited, and the final temperature of the whole system is 53.5 ∘C.The value of specific heat for aluminum is 0.22 Cal/kg⋅C∘, and for water...