Answer:
B) ΔT = Q/mCp
Explanation:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.Cp. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
Cp = specific heat capacity of substance
ΔT = change in temperature
ΔT = Final temperature - initial temperature
The substances with higher value of specific heat capacity require more heat to raise the temperature by one degree as compared the substances having low value of specific heat capacity.For example,
The specific heat capacity of oil is 1.57 j/g. K and for water is 4.18 j/g.K. So, water take a time to increase its temperature by one degree by absorbing more heat while oil will heat up faster by absorbing less amount of heat.
Heat, like work, is an energy transfer measured in:
<span>joules.......I hope this helps</span>
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<span>Given mass: 3.810 g of h2o and 13.96 g of co2.
Mass of CO2 : 13.96 g
moles of CO2 : 0.317 moles / 44.0098
moles of C : 0.317 moles
Mass of water = 3.81 g
moles of water = 0.212 moles / 18.015
moles of H = 0.423 moles X2
Hence the molar ratio C : H is 0.317 : 0.423
= 1.000 : 1.334
Multiplying by 3 on both ratios we get: 3.000 : 4.003
Therefore the empirical formula is C3H4</span>
Answer:
The volume of helium at 25.0 °C is 60.3 cm³.
Explanation:
In order to work with ideal gases we need to consider absolute temperatures (Kelvin). To convert Celsius to Kelvin we use the following expression:
K = °C + 273.15
The initial and final temperatures are:
T₁ = 25.0 + 273.15 = 298.2 K
T₂ = -196.0 + 273.15 = 77.2 K
The volume at 77.2 K is V₂ = 15.6 cm³. To calculate V₁ in isobaric conditions we can use Charle's Law.
![\frac{V_{1}}{T_{1}} =\frac{V_{2}}{T_{2}} \\V_{1}=\frac{V_{2}}{T_{2}} \times T_{1}=\frac{15.6cm^{3} }{77.2K} \times 298.2K=60.3cm^{3}](https://tex.z-dn.net/?f=%5Cfrac%7BV_%7B1%7D%7D%7BT_%7B1%7D%7D%20%3D%5Cfrac%7BV_%7B2%7D%7D%7BT_%7B2%7D%7D%20%5C%5CV_%7B1%7D%3D%5Cfrac%7BV_%7B2%7D%7D%7BT_%7B2%7D%7D%20%5Ctimes%20T_%7B1%7D%3D%5Cfrac%7B15.6cm%5E%7B3%7D%20%7D%7B77.2K%7D%20%5Ctimes%20298.2K%3D60.3cm%5E%7B3%7D)
Answer : The balanced chemical reaction will be:
Or,
Explanation :
Autoionization of water : The autoionization of water means that the reaction water with water means self ionization.
In the autoionization of water, one water molecule loses an hydrogen ion and another one gains it.
The balanced chemical reaction will be:
Or,