Question

station 1 temperature change

1. calculate the change in temperature for the following:

a) 23 c to 73 c
b) -12 c to 56 c
c) 13 c to 108 c
d) -2 c to 85 c
e) 23 c to 92 c
f) 6.7 c to 13.4 c
g) 65 c to 237 c
h).05 c to 1.2 c
i) 45.7 c to 67.2 c
j) 56.3 c to 235.2 c

1. supply the variable names and units for the following symbols:

a. q =
b. m =
c. cp =
d. change in temp. =
e. in your own words, define specific heat

Explanation:

Step1: Calculate temperature changes

a. $\Delta T=73 - 23=50^{\circ}C$
b. $\Delta T = 56-(-12)=56 + 12=68^{\circ}C$
c. $\Delta T=108 - 13 = 95^{\circ}C$
d. $\Delta T=85-(-2)=85 + 2=87^{\circ}C$
e. $\Delta T=92 - 23=69^{\circ}C$
f. $\Delta T=13.4 - 6.7 = 6.7^{\circ}C$
g. $\Delta T=237 - 65=172^{\circ}C$
h. $\Delta T=1.2 - 0.05 = 1.15^{\circ}C$
i. $\Delta T=67.2 - 45.7=21.5^{\circ}C$
j. $\Delta T=235.2 - 56.3=178.9^{\circ}C$

Step2: Define variables

a. $Q$: Heat energy, unit is joule (J)
b. $M$: Mass, unit is kilogram (kg)
c. $C_p$: Specific - heat capacity, unit is joule per kilogram per degree Celsius ($J/(kg\cdot^{\circ}C)$)
d. Change in temp. ($\Delta T$): Temperature change, unit is degree Celsius ($^{\circ}C$)
e. Specific heat is the amount of heat energy required to raise the temperature of one - kilogram of a substance by one degree Celsius.

Answer:

1.
a. $50^{\circ}C$
b. $68^{\circ}C$
c. $95^{\circ}C$
d. $87^{\circ}C$
e. $69^{\circ}C$
f. $6.7^{\circ}C$
g. $172^{\circ}C$
h. $1.15^{\circ}C$
i. $21.5^{\circ}C$
j. $178.9^{\circ}C$
2.
a. Heat energy, J
b. Mass, kg
c. Specific - heat capacity, $J/(kg\cdot^{\circ}C)$
d. Temperature change, $^{\circ}C$
e. The amount of heat energy required to raise the temperature of one - kilogram of a substance by one degree Celsius.