Explain the mathematical sign for the energy change

Reference no: EM13533939

What would be the mathematical sign for the energy change (positive for endothermic or negative for exothermic) for each of the following processes? Explain the reasoning for each choice:

a. Solid dry ice sublimes at room temperature (about 22.0 ºC).

b. Two hydrogen atoms combine to make a hydrogen molecule.

c. Molten (liquid) sodium cools to form solid sodium.

d. Burning of gasoline in a car engine.

Reference no: EM13533939

Questions Cloud

Describe the 1-bromobutane is first formed : When the 1-bromobutane is first formed it often has a yellow or brown color, but pure 1-bromobutane is colorless. explain why in your own word please

What type of clients do they serve : What type of clients do they serve?

Compute the work done in stretching the spring : A certain peculiar spring is found not to conform to Hooke's Law. Compute the work done in stretching the spring from x = 0.5 m to x = 1.0 m

What is the resultant force at given point : A small block of mass m slides along a frictionless loop-the-loop track. If it starts from rest at point P. What is the resultant force at point Q

Explain the mathematical sign for the energy change : What would be the mathematical sign for the energy change (positive for endothermic or negative for exothermic) for each of the following processes. Explain the reasoning for each choice:

Find the maximum distance the spring will be compressed : A 2.0 kg block is dropped from a height of 0.40 meter onto a spring of force constant k = 1960 N/m. Find the maximum distance the spring will be compressed

State a balanced thermochemical equation : When 1 mol of CO (g) forms from its elements, 110.5 kJ of heat is released. Write a balanced thermochemical equation for formation of one mole of CO.

What is its kinetic energy one minute after launching : A satellite rocket weighing 200,000 N acquires a speed of 2000 m/s in 1 minute after launching. What is its kinetic energy one minute after launching

Decision making a list of relevant costs : Decision making, a list of relevant costs

User Account

All Pages