A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.
Answer:
Explanation:
(a)
The balanced chemical equation for the reaction of methane with oxygen gas to form carbon dioxide and water is shown below as;
(b)
The balanced chemical equation for the reaction of butane with oxygen gas to form carbon dioxide and water is shown below as;
(c)
The balanced chemical equation for the reaction of solution of sulfuric acid reacts with aqueous potassium hydroxide to produce potassium sulfate and water is shown below as;
Increase in greenhouse gas emission
Explanation:
Global average temperature of the earth is increasing due to a surge in the amount of greenhouse gases being emitted.
The major greenhouse gas is carbon dioxide.
This gas is produced by a wide range of industrial processes and combustion of fuels in automobiles.
Anomalous concentration of this gas in the atmosphere leads to an increase in earth's temperature.
These gases interacts with long wave radiation produced by the earth and prevents them from escaping. In turn, they warm the earth and keep it at fairly uniform temperature.
When these gases are too much in concentration they lead to an anomalous increase in temperature.
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(2.5)(3.5)=10V²
The answer is 0.875 repeating liters.
Answer:
64,433.6 Joules
Explanation:
<u>We are given</u>;
- Volume of water as 220 mL
- Initial temperature as 30°C
- Final temperature as 100°C
- Specific heat capacity of water as 4.184 J/g°C
We are required to calculate the amount of heat required to raise the temperature.
- We know that amount of heat is calculated by;
Q = mcΔT , where m is the mass, c is the specific heat, ΔT is the change in temperature.
Density of water is 1 g/mL
Thus, mass of water is 220 g
ΔT = 100°C - 30°C
= 70°C
Therefore;
Amount of heat, Q = 220g × 4.184 J/g°C × 70°C
= 64,433.6 Joules
Thus, the amount of heat required to raise the temperature of water is 64,433.6 Joules
