Answer:
39.4 kJ
Explanation:
Given mass = 25.0 g
Specific heat of ammonia (g) = 4.7 J/g.K
Specific heat of ammonia (l) = 2.2 J /g.K
ΔHvap = 23.5 x 10³ J /mol
Heating liquid ammonia from -65 °C to -33.4°C
Q₁ = m s ΔT = = 25.0 g * 4.7 J/g.K * [-33.4 - (-65)] °C = 3713 J
Evaporating 25 g of ammonia at -33.4°C
Molar mass of ammonia = 17 g/mol
Thus, moles = 25 / 17 moles
Q₂ = (25 / 17) mol * ΔHvap = 1.470 mol * 23.5 x 10³ J /mol = 34558.8 J
Heating NH₃(g) from -33.4°C to -12.0°C
Q₃ = m s ΔT = = 25.0 g * 2.2 J/g.K * [-12.0 - (-33.4)] °C = 1177 J
<u>Total heat energy = Q₁ + Q₂ +Q₃ = 39448.8 J = 39.4 kJ (As 1 J = 10⁻³ kJ)</u>
The answer is b after I finish my test ill give you the anwsers
Calculation, add them. 0.85 x 5 = 4.25 Ω
Answer: experiment data is the things you do in the experiment and the result is the answer
Answer:
They had different beliefs and backgrounds.
Explanation:
Ptolemy believed in geocentric model of the solar system -the earth at the center and the sun, other planets and stars revolved about it. His belief was based on his observation that sun and other objects in sky seemed to revolve about the Earth as they rose and set in one day.
Copernicus while reading a book, constructed the theory of heliocentric system which was later proved through observations.
