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>
Answer:
Best at conductioning heat- Solid
Explanation:
<u><em>In order for heat to conduct it has to pass from particle to particle.</em></u>
A solid has particles closely compacted so the heat is able to tranfer quickly from particle to particle.
A liquid has isn't as compacted it actually has enough space to slide over each other
A gas has very far apart particles and takes heat longer to transfer from one particle to another.
The letter “j” is never found on the periodic table. As for numbers, there’s an infinite amount
.
<h3>Explanation</h3>
The Stefan-Boltzmann Law gives the energy radiation <em>per unit area</em> of a black body:
where,
the total power emitted, 
the surface area of the body, 
the Stefan-Boltzmann Constant, and
the temperature of the body in degrees Kelvins.
.
.
.
Keep as many significant figures in as possible. The error will be large when is raised to the power of four. Also, the real value will be much smaller than 
since the emittance of a human body is much smaller than assumed.
Answer:
A bicycle on the top of the hill has the highest potential energy, and when the bike goes down, it transfers to kinetic because it is moving
Explanation:
yeah
