The final temperature of a 10.0 g aluminum block initially at 25.0°C after applying 435 joules of energy is c) 73.3°C. The change in temperature is found to be 48.3°C.
To determine the final temperature of a 10.0 g aluminum block originally at 25.0°C after applying 435 joules of energy to it, we can use the formula for heat transfer:
Q = mcΔT, where
Q is the heat added (435 J)m is the mass of the aluminum (10.0 g or 0.01 kg)c is the specific heat capacity of aluminum (900 J/kg∙K)ΔT is the change in temperatureFirst, rearrange the formula to solve for the change in temperature (ΔT):
ΔT = Q / (mc)
Substituting the known values:
ΔT = 435 J / (0.01 kg * 900 J/kg∙K) = 435 / 9 = 48.3°C
Since the initial temperature is 25.0°C, the final temperature will be:
Final temperature = Initial temperature + ΔT = 25.0°C + 48.3°C = 73.3°C
Therefore, the final temperature of the aluminum block is c) 73.3°C.
Complete Question:
Determine the final temp of a 10.0 g aluminum block originally at 25°C if you apply 435 J of energy to it. The specific heat of aluminum is 0.89 J/g°C.
a) 57.9°C
b) 64.3°C
c) 73.3°C
d) 83.2°C
at 20 degrees celsius, how much sodium chloride could be dissolved in 2L of water
In this exercise we are going to deal with the solubility of a solution in which the amount of diluted sodium is 718 g.
What is the definition of a solution?Solutions are homogeneous systems formed by mixing two or more substances. Solutions are made up of two components: the solute, which is the one that dissolves and is found in the smallest amount, and the solvent, which is the component in the largest amount and acts by dissolving the solute.
In this way we have that:
35.89g of NaCl dissolve in 100 g of water at 20 °C.Making the calculus we have:
[tex](35.89g / 100 mL) * (2000) = 718 g[/tex]
See more about solution at brainly.com/question/7932885
FeCO3 → FeO + CO2 is what kind of reaction?
Double replacement
Decomposition
Synthesis
Single replacement
Which of the following indicates a chemical change?
Question 7 options:
A.an exploding firecracker
B.a freezing ice cube
C.wood breaking into splinters
D.a wire conducting electricity
Answer: Option (A) is the correct answer.
Explanation:
Chemical changes are defined as the change which tend to show difference in chemical composition of a substance.
For example, toxicity, reactivity, combustion etc are all chemical properties.
A chemical change will always lead to the formation of a new compound and this change is irreversible in nature by any physical means.
When we explode a fire cracker then it is a chemical change.
On the other hand, a change which is unable to bring any difference in chemical composition of a substance is known as a physical change.
For example, change in shape, size, mass, volume etc are all physical properties.
Physical changes are reversible in nature.
Thus, we can conclude that out of the given options an exploding firecracker indicates a chemical change.
The molar volumes of solid and liquid lead at the normal melting temperature of lead are, respectively, 18.92 and 19.47 cm3. calculate the pressure
We use the formula:
ΔP = (ΔH / ΔV) ln(T2 / T1)
where,
ΔH = change in enthalpy from solid to liquid = 4810 J/mol
ΔV = change in volume from solid to liquid = 0.55 cm^3/mol
T2 = 620 K, T1 = 600 K
So,
ΔP = (4810 / 0.55) ln(620 / 600)
ΔP = 286.76 J/cm^3
or converting to atm:
ΔP = 2830 atm
Answer:
ΔP = (ΔH / ΔV) ln(T2 / T1)
Explanation: