What is the direct function of the energy released from the nuclear chain reaction in a nuclear power
plant?
O turning the blades of the turbine
O heating water to produce steam
O powering the condenser
O carrying electricity from the plant to
consumers

Answer #1:

B) Heating water to produce steam

Answer #2:

A generator converts:  

✔ mechanical energy

to:  

✔ electrical energy.

Which statement best describes control rods?

B. They are inert.

Without a critical MASS of fissionable material, a nuclear reaction cannot be sustained. The turbine is powered by STEAM.

Which statement(s) correctly describe the fissionable material used in a nuclear power plant?

B. unstable isotopes

C. source of thermal energy

D. poses health problems

A nuclear power technician determines that the fission rates need to be increased. Which of these tasks will the technician most likely carry out?

D. raising control rods from the reactor

Which statement would be a valid argument in favor of using nuclear power?

D. Nuclear power does not contribute greenhouse gases.

Describe three risks or disadvantages of nuclear power.

Fuel for nuclear power plants is a radiation hazard to miners and other nuclear power workers.

Nuclear waste requires long-term storage.

Mining nuclear fuels can damage the environment.

Human error at plants can lead to meltdowns, which endanger the environment and human health.

Natural disasters can lead to radiation leaks.

Though currently abundant, nuclear fuels are nonrenewable resources.

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol