Answer:
ΔT = 0.78 °C
Explanation:
Given data:
Mass of Al = 9.5 g
Specific heat capacity of Al = 0.9 J/g.°C
Temperature change = ?
Heat added = 67 J
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
67 J = 9.5 g × 0.9 j/g.°C × ΔT
67 J = 85.5 j/°C × ΔT
ΔT = 67 J / 85.5 j/°C
ΔT = 0.78 °C
Answer: It does use synthetic material.
Explanation:
The series of chemical reactions that are used to change natural resources into synthetic products is called chemical synthesis. It is more natural than synthetic, because its shape has been changed, but the material is still wood.
The common greenhouse gas containing only hydrogen and oxygen is H2O, this is water vapor.
The common greenhouse gases are water vapor, carbon dioxide, methane, nitrous oxide and ozone.
The composition (chemical formula) of those gases are:
Water vapor: H2O
Carbon dioxide: CO2
Methane: CH4
Nitrous oxide: NO
Ozone: O3.
As you see the only one of those that contains only hydrogen and oxygen is H2O, water vapor.
Both have a continuous light spectra the fluorescent source makes a spectra with more intense bands of mercury
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Answer:
a) : > 0
b) : < 0
c) : <0
d) : < 0
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
is positive when randomness increases and is negative when randomness decreases.
a)
As 2 moles of gaseous reactants are converted to 3 moles of gaseous products , randomness increases and thus sign of is positive.
b)
As 5 moles of gaseous reactants are converted to 4 moles of gaseous products , randomness decreases and thus sign of is negative.
c)
As gas is changing to liquid, randomness decreases and thus sign of is negative.
d)
As gaseous and liquid reactants are converted to solid products , randomness decreases and thus sign of is negative