1.90 × 10³ J of heat,in combination with high pressure,are needed to transform one mole of the graphite form of carbon into the diamond form.How many kilocalories is this?

Question

Quizplus · Accepted Answer

To convert J to kcal:
1 kcal = 4.184 kJ = 4.184 × 10^3 J
Therefore, 
(1.90 × 10^13 J) / (4.184 × 10^3) = 4.54 × 10^9 kcal = 0.454 kcal. 
Thus, the correct answer is B.

190 × 103 J of Heat,in Combination with High Pressure,are

190 × 10³ J of Heat,in Combination with High Pressure,are