The volume decreases when the pressure is increased or when the temperature is decreased.
According to Charles's law, the volume of a given mass of gas is directly proportional to its absolute temperature at constant pressure. This means that, if the temperature of the given mass of gas is decreased, its volume decreases accordingly and vice versa.
According to Boyle's law, the volume of a given mass of gas is inversely proportional to its pressure. Hence, when the pressure of a gas is increased, its volume decreases accordingly.
Summarily, the volume decreases when the pressure is increased or when the temperature is decreased.
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The correct option should be ultrasound technology (option B) because it is related to sonographers or ultrasound technicians. they are most likely with while pregnancy but they have plenty of uses, such as evaluating and diagnosis, many medical treatment for elderly patients.
Answer:
Q ≈ 1 x 10⁵ joules (1 sig. fig. based on 50g sample given)
Explanation:
Three heat transitions need be considered. Cooling the steam to 100°C, condensing the steam to water and cooling the water from 100°C to 87°C.
Total Heat exchange (Q) = ∑ heat transitions
Q = (m·c·ΔT)steam + (m·ΔH)condensation + (m·c·ΔT)water cooling
= (50g x 0.48j/g·°C x 14°C) + (50g x 2259j/g) + (50g x 4.184j/g·°C)
= 24j + 112,950j + 209.2j
= 113,183.2j ≈ 1 x 10⁵ joules (1 sig. fig. based on 50g sample given)
Air has a lower heat capacity which is the property of a material that describes how much heat energy is required to change the temperature of a substance by one degree Celsius <span />
The rate of reaction refers to how fast or slow a reaction is. The rate of reaction can be increased by;
i) Using finely divided sodium carbonate
ii) Increasing the temperature
<h3>Rate of reaction</h3>
Thee term rate of reaction refers to the pace of a chemical reaction. A reaction could be fast or slow.
To increase the rate of this reaction;
i) The sodium bicarbonate could be used in the finely divided form.
ii) The temperature could be raised.
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