Answer: The Fahrenheit temperature will not be doubled. The freezing point of water on the Celsius scale is 0⁰ while the boiling point of water on that scale is 100⁰. On the Fahrenheit scale, the values are 32⁰ and 212⁰ respectively. Since the difference between the two points on the Fahrenheit scale is 180 and the difference on the Celsius scale is 100, there are 180/100 or 1.8 Fahrenheit degree for every Celsius degree. Since they aren’t in a one to one correspondence, doubling the Celsius temperature won’t result in a doubling of the Fahrenheit temperature.

Answer: Q = mc_w(t_f – t_i)

                1200 cal = (500 g)(1 cal/g-C⁰)(t_f – 25⁰ C)

                1200 = 500( t_f – 25)

                1200 = 500t_f – 12500

                500 t_f = 13700

                t_f = 27.4⁰ C

 

Answer: If the windows are closed, the inside of the car will warm up due to the “greenhouse effect”. The sun passing through the glass contains energy. The seats and other types of material inside the car absorb this energy which then heats the air inside the car. This can cause potential harm in the summer time when the sun is higher in the sky, especially to pets left inside the car. In the wintertime, the sun is not overhead and less energy enters the car.

Answer: The sample of copper undergoes the largest increase in temperature. This is because it has a smaller specific heat. Less energy is required to raise the temperature of 1 gram of copper 1 degree Celsius.

 

For copper, 1000 cal = (0.092 cal/g-⁰C)(change in temp.)(20 g).  Solving for the change in temperature, you should calculate 540⁰ C.

 

For water, 1000 cal = (1 cal/g-⁰C)(change in temp.)(20 g).  In this case, the change in temperature will be only 500 C.