Which molecule contains a nonpolar covalent bond?A. HCI B. F2 C. CO2 D. NH3
1 answer:
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Answer:
The energy required to heat 1.30 kg of water from 22.4°C to 34.2°C is 64,121.2 J
Explanation:
Calorimetry is the measurement of the amount of heat that a body gives up or absorbs in the course of a physical or chemical process.
The sensible heat of a body is the amount of heat received or transferred by a body when undergoing a temperature variation (Δt) without there being a change in physical state. That is, when a system absorbs (or gives up) a certain amount of heat, it may happen that it experiences a change in its temperature, involving sensible heat. Then, the equation for calculating heat exchanges is:
Q = c * m * ΔT
Where Q is the heat or quantity of energy exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature (ΔT=Tfinal - Tinitial).
In this case:
- m= 1.30 kg= 1,300 g (1 kg=1,000 g)
- ΔT= 34.2 °C - 22.4 °C= 11.8 °C= 11.8 °K Being a temperature difference, it is independent if they are degrees Celsius or degrees Kelvin. That is, the temperature difference is the same in degrees Celsius or degrees Kelvin.
Replacing:
Q= 64,121.2 J
<u><em>The energy required to heat 1.30 kg of water from 22.4°C to 34.2°C is 64,121.2 J</em></u>
0.33g
Explanation:
Given parameters:
Diameter of cylinder = 0.234cm
length = 2.697cm
unknown:
mass of the cylinder = ?
Solution:
To solve this problem, we know that density of the aluminium can be determined and it is a constant.
Density is the mass per unit volume of a substance
Density =
Mass of the cylinder = density x volume
To calculate the volume of cylinder;
Volume = π r² h
radius of the cylinder = = 0.12cm
Volume = 3.142 x 0.12² x 2.697 = 0.12cm³
Density of aluminium = 2.7g/cm³
Mass of the cylinder = 0.12 x 2.7 = 0.33g
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